EXHIBIT 99.1




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                                  NEWS RELEASE


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        DATE:           October 26, 2005        5:00 p.m. E.S.T.
        CONTACT:        James L. Saner, Sr.  President and CEO
                        MainSource Financial Group  812-663-0157

                        James H. Greiner     President
                        HFS Bank, F.S.B.  219-942-1175 Ext. 303


                 MainSource Financial Group and HFS Bank, F.S.B.
                          Announce Definitive Agreement

     MainSource  Financial  Group,  Inc.,  Greensburg,  Indiana  (Nasdaq:  MSFG)
("MainSource"), and HFS Bank, F.S.B., Hobart, Indiana (OTC: HFSK) ("HFS"), today
jointly  announced  that they have entered into a definitive  agreement to merge
HFS into a newly-formed subsidiary of MainSource.

     The  Agreement  provides  that  shareholders  of HFS  will  receive  merger
consideration  valued at approximately  $19.35 in exchange for each share of HFS
common stock owned by them, subject to the potential adjustment described in the
next paragraph. The merger consideration is payable in cash or MainSource stock,
or a combination  of cash and stock,  at the election of the holder,  subject to
certain limits and allocations.  The exchange ratio used to determine the number
of MainSource shares to be issued to HFS shareholders will be adjusted to ensure
that  the  $19.35  of  value  is  maintained  if the  average  closing  price of
MainSource  common stock (as determined in the merger  agreement)  falls between
$17.00  and  $21.00 at the time of  closing.  If the  average  closing  price of
MainSource  common stock is less than $17.00 per share,  the exchange ratio will
be fixed at 1.1382 and the value of the MainSource  stock received in the merger
will be less than $19.35 per share.  If the average  closing price of MainSource
stock is greater  than  $21.00 per share,  the  exchange  ratio will be fixed at
..9214 and the value of the  MainSource  stock  received  in the merger  would be
greater  than $19.35 per share.  The  transaction  value is  estimated  at $36.1
million, subject to the potential adjustments described below.


     The amount of cash or stock payable to HFS' shareholders may be adjusted at
the time of closing based on the value of HFS' consolidated shareholders' equity
as of the  end  of  the  month  prior  to  closing,  after  certain  adjustments
prescribed by the agreement have been made. However,  52% of the HFS shares must
be  converted  into  shares  of  MainSource  common  stock,  and  there  may  be
allocations of cash or stock made to shareholders (on the basis of the number of
shares held by a shareholder) to ensure that this requirement is satisfied.

     The transaction,  which is expected to close in the second quarter of 2006,
is  subject  to  various   regulatory   approvals   and  the  approval  of  HFS'
shareholders.

     The  transaction is expected to be accretive to  MainSource's  earnings per
share during the first full year following the transaction. The transaction will
allow  MainSource  to  establish  a  presence  in Lake and  Porter  Counties  in
Northwest  Indiana.  MainSource plans to continue to operate all of HFS' current
offices under the "MainSource" name.



     James L. Saner,  Sr.,  President and Chief Executive  Officer of MainSource
stated,  "The  acquisition of HFS Bank is a great fit in the MainSource  family.
Jim Greiner and his employees  have been  providing  community  banking in their
areas for years and have been serving their customers well. Our partnership will
allow HFS to become an even better  bank  because in the future we will focus on
commercial business as well as continue offering a full array of retail products
to the communities they serve."

     Under the  Agreement,  James H.  Greiner  will remain as  President  of the
newly-named entity, and will maintain his office in the current Hobart,  Indiana
office location.

     James H.  Greiner,  President  of HFS,  stated,  "We are excited  about the
partnership we are entering into with  MainSource,  which will allow us to focus
on expanding our business  banking  services,  as well as the retail products we
offer to our  Northwest  Indiana  customers.  We  believe  that  the  MainSource
community banking philosophy is similar to our current approach and that it will
serve our customers  and employees  well. We will continue to be involved in the
community as we have for the past 71 years."

     MainSource Financial Group, Inc., headquartered in Greensburg,  Indiana, is
a   community-focused,   financial  services  holding  company  with  assets  of
approximately  $1.6 billion.  Through its two banking  subsidiaries,  MainSource
Bank, Greensburg,  Indiana and MainSource Bank of Illinois,  Kankakee, Illinois,
it operates 54 offices in 23 Indiana  counties and six offices in three Illinois
counties.  Through  its  non-banking  subsidiaries,  MainSource  Insurance  LLC,
MainSource  Title LLC and MainSource  Mortgage LLC, it provides  various related
financial services through its banking affiliates.

     HFS Bank maintains a total of six offices in Hobart, Portage,  Griffith and
Crown Point,  Indiana and has been serving Northwest Indiana since 1934. HFS has
$235.8 million in total assets and $20.8 million in total  shareholders'  equity
as of September 30, 2005.

Forward-Looking Statements

     Except for historical  information contained herein, the discussion in this
press  release  may  include  certain  forward-looking   statements  based  upon
management expectations. Factors which could cause future results to differ from
these  expectations   include  the  following:   general  economic   conditions;
legislative  and  regulatory  initiatives;  monetary and fiscal  policies of the
federal government;  deposit flows; the costs of funds;  general market rates of
interest;  interest  rates on competing  investments;  demand for loan products;
demand for financial services; changes in accounting policies or guidelines; and
changes in the quality or  composition of the  MainSource's  loan and investment
portfolios; the timing of the closing of the transaction; the timing and success
of  integration   efforts  once  the   transaction  is  complete;   MainSource's
expectations  or ability to realize success with the acquisition of HFS, and the
impact of this transaction, if successful, on MainSource's business.



     The  forward-looking  statements  included in the press release relating to
certain matters involve risks and uncertainties, including anticipated financial
performance,  business  prospects,  and other  similar  matters,  which  reflect
management's best judgment based on factors currently known.  Actual results and
experience  could  differ  materially  from  the  anticipated  results  or other
expectations expressed in the Company's  forward-looking  statements as a result
of a number of factors,  including  but not limited to,  those  discussed in the
press release.

     The proposed  merger will be submitted to HFS  shareholders  for  approval.
MainSource  will be filing a  Registration  Statement on Form S-4 concerning the
merger with the Securities and Exchange Commission  ("SEC"),  which will include
the proxy statement/prospectus that will be mailed to HFS' shareholders. WE URGE
INVESTORS TO READ THE PROXY  STATEMENT/PROSPECTUS  WHEN IT BECOMES AVAILABLE AND
ANY  OTHER  RELEVANT  DOCUMENTS  FILED  WITH THE SEC OR THE OTS,  AS WELL AS ANY
AMENDMENTS  OR  SUPPLEMENTS  TO  THOSE  DOCUMENTS,  BECAUSE  THEY  WILL  CONTAIN
IMPORTANT  INFORMATION.  Investors  will be able to obtain the documents free of
charge, when filed, at the SEC's website,  www.sec.gov.  In addition,  documents
filed  with the SEC by  MainSource  will be  available  free of charge  from the
Secretary of MainSource at 201 N. Broadway,  P.O. Box 87, Greensburg,  IN 47240,
telephone (812) 663-0157.  Documents filed with the Office of Thrift Supervision
by HFS will be  available  free of charge from the  Secretary of HFS at 555 East
Third Street, Hobart, Indiana,  telephone (219) 942-1175.  INVESTORS SHOULD READ
THE PROXY STATEMENT/PROSPECTUS CAREFULLY BEFORE MAKING A DECISION CONCERNING THE
MERGER.  Copies of all  recent  proxy  statements  and annual  reports  are also
available free of charge from the respective companies by contacting the company
secretary.

     MainSource and HFS and their  respective  directors and executive  officers
may be deemed to be participants  in the  solicitation of proxies to approve the
Merger.  INFORMATION  ABOUT THE  PARTICIPANTS  MAY BE OBTAINED THROUGH THE SEC'S
WEBSITE  FROM THE  DEFINITIVE  PROXY  STATEMENT  FILED WITH THE SEC ON APRIL 29,
2005,  WITH RESPECT TO MAINSOURCE AND THE DEFINITIVE  PROXY STATEMENT FILED WITH
THE OFFICE OF THRIFT SUPERVISION ON OR ABOUT JUNE 18, 2005, WITH RESPECT TO HFS.
Additional  information  about  the  interests  of the HFS  participants  may be
obtained from reading the definitive  proxy  statement/prospectus  regarding the
proposed merger when it become available.

For more information contact:

                                    * * * * *

 MainSource Financial Group, 201 N. Broadway, P.O. Box 87, Greensburg, IN 47240

                                       or

         HFS Bank, F.S.B., 555 East Third Street, Hobart, Indiana 46342