EXHIBIT 99.1

NEWS
For Immediate Release                          From MasTec, Inc.
September 30, 1997                             3155 N.W. 77th Avenue, Suite 135
                                               Miami, Florida 33122-1205
                                               Tel :    (305) 599-1800
                                               Fax :    (305) 406-1908
                                               For more information contact:
                                               Edwin D. Johnson,
                                               Chief Financial Officer
                                               ejohnson@mastec.com


              MASTEC ANNOUNCES PARTIAL SALE OF SUPERCANAL HOLDINGS

MIAMI, FL - MasTec, Inc. (NYSE: MTZ) announced today that Multicanal,  S.A., one
of the  leading  cable  television  operators  in  Argentina,  has  acquired  an
additional  5.5% of  Supercanal  Holding,  S.A., an Argentine  cable  television
operator, from MasTec for $20 million in cash. In addition,  MasTec has obtained
agreement  from  Supercanal  shareholders  to convert a portion of its remaining
23.3% equity stake in Supercanal ordinary shares to preferred, non-voting shares
with registration rights. MasTec will retain approximately 13.5% voting interest
in the company.

Jorge Mas,  President and Chief  Executive  Officer of MasTec,  said: "The value
created  during our two year  investment  in  Supercanal  is  indicative  of the
tremendous  opportunities  we  see  in  South  America.  Our  core  business  of
communications  infrastructure  services provides us with an excellent  platform
from which to see these  opportunities as they develop and we are confident that
additional high yield investments may be obtained in the future. We have elected
to retain a significant  interest in Supercanal as we believe  additional  value
can be created for our shareholders."

Opening the Lines of  Communication(R)  worldwide,  MasTec is one of the world's
leading telecommunications and related infrastructure service providers, serving
clients throughout the United States, Latin America and Spain.

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