EXHIBIT 99.1



                                                                 [MASTEC LOGO]



NEWS

For Immediate Release                            From MasTec, Inc.
April 1, 1996                                    8600 N.W. 36 Street, 8th Floor
                                                 Miami, Florida 33166
                                                 Tel:  (305) 599-1800
                                                 Fax:  (305) 599-1572
                                                 For more information contact:
                                                 Edwin D. Johnson,
                                                 Chief Financial Officer


                    MASTEC AGREES TO ACQUIRE TELEFONICA UNIT

         MIAMI, FL - MasTec,  Inc.  (NASDAQ:MASX) and Telefonica de Espana, S.A.
announced  today an agreement to sell 100% of the capital stock of  Telefonica's
telecommunications construction services subsidiary, Sistemas e Instalaciones de
Telecomunicacion,   S.A.   ("Sintel"),   to  MasTec.   Sintel  is  the   leading
telecommunications  construction services company in Spain and has operations in
Argentina, Chile, Peru and Venezuela.

         The acquisition  will more than double the size of MasTec,  creating an
international  telecommunications  construction  services  provider  with  total
combined  assets  of  approximately  $480  million  and more  than  5,000  total
employees.  The combined  company will be one of the largest  telecommunications
construction  services  companies in the world,  with  operations  in 35 states,
Spain, Argentina, Chile, Peru and Venezuela.

         The purchase price is $39.5 million (all dollar amounts in this release
reflect a current  exchange rate of 124 Spanish pesetas to the dollar) and is to
be paid over three years.

         For 1995, Sintel had:  consolidated revenue of $390 million;  operating
income,  not including the  restructuring  charge,  of $27.54 million;  Earnings
before  interest,  taxes,  depreciation  and  amortization,  not  including  the
restructuring charge, of $32.55 million; and a


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net loss of $14.07 million, which includes a $27.86 million restructuring charge
resulting from personnel reductions and other cost cutting measures.

         Candido  Velazquez,  Chairman of  Telefonica,  stated:  "We are excited
about the sale of Sintel to MasTec in that it will allow  Sintel to be part of a
global telecom services company which will afford it more growth  opportunities.
In  addition,  Telefonica  is  pleased  to  work  with  MasTec  as  our  leading
construction   services   partner   across  the  world  in  further   developing
Telefonica's core operations."

         As part of the agreement  and to  contribute to the financial  strength
and future viability of Sintel, Telefonica has agreed to the following:

                  o        The award of a three year, $604 million construction 
                           services contract.

                  o        To  make  a  capital contribution to Sintel of $24.2
                           million.

                  o        To purchase certain fixed assets, land and buildings 
                           for $12.1 million.

                  o        To pay a tax credit to Sintel of $4.7 million.

         The capital  contribution,  purchase of fixed assets and payment of the
tax credit have all been made prior to April 1.

         The cash infusion from Telefonica is to be used to reduce Sintel's debt
to increase operating efficiencies.

         The financial  restructuring  will leave Sintel with approximately $323
million in assets,  including  $232 million of accounts  receivables,  and total
debt of approximately $63 million.

         Jorge  Mas,  Chief  Executive  Officer of  MasTec,  stated:  "This is a
significant  step in the  history  of MasTec,  not only  because of its size and
expected  positive  financial  impact but because it is anticipated  that Sintel
will provide us with high growth  opportunities  using an established company in
the emerging  Spanish cable  television  market and the explosive Latin American
telecommunications market. By being removed from the Telefonica umbrella, Sintel
can now pursue a  diversification  strategy,  expanding its client base to other
telecommunications  companies.  This also provides MasTec with additional  human
resources throughout the world, which will better allow us to execute our growth
strategy."

         Mr.  Mas  also  indicated  that  Sintel's  existing  management,  which
engineered  an impressive  turnaround in 1995 results,  will continue to operate
Sintel.  Sintel's  current  president,  Jose Luis Ucieda  Arcas,  will remain as
president.

         The acquisition has been approved by the respective boards of directors
of MasTec and Telefonica. Closing is scheduled for April 30, 1996.

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Financial  Highlights  (year ended  December 31, 1995) (in U.S.  dollars,  at an
assumed  exchange  rate of 124:1,  and which have been  derived from the audited
financial  statements of Sintel  prepared under  generally  accepted  accounting
principles in Spain, which differ from U.S. GAAP):

================================================================================
                                  SINTEL GROUP (1)              SINTEL SPAIN
- --------------------------------------------------------------------------------
Revenue                              $392,778,113               $251,995,266
- --------------------------------------------------------------------------------
EBITDA                                $32,549,282                $20,027,556
- --------------------------------------------------------------------------------
EBIT                                  $27,536,331                 17,124,411
- --------------------------------------------------------------------------------
Interest Expense                      $17,563,282                $14,592,403
- --------------------------------------------------------------------------------
Restructuring Expense                 $27,864,000                $26,538,637
- --------------------------------------------------------------------------------
Net income (loss)                    $(14,078,766)              $(15,168,758)
================================================================================

(1)      Includes Sintel-Spain as well as Sintel's South American  subsidiaries,
         which have been accounted for based on Spanish GAAP.


         MasTec is filing today with the  Securities  and Exchange  Commission a
Current Report on Form 8-K, to which reference is hereby made.

  
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