Ledger (left) and Mary-Kate Olsen
Jeff Vespa/WireImage; Cliff Lipson/Showtime
spoke out Friday for the first time since
's death earlier this week.
"Heath was a friend. His death is a tragic loss. My thoughts are with his
family during this very difficult time," Olsen said in a statement released
through her rep to PEOPLE.
Olsen was one of the first people to be alerted about the actor's death,
when the masseuse who discovered Ledger's body on Tuesday called the
Starting at 3:17 p.m. Tuesday masseuse Diana Wolozin spent nine minutes
making three phone calls to Olsen – and waiting more than a minute
between each call – before dialing 911, then called Olsen a fourth
time after paramedics arrived at Ledger's New York apartment, the Associated
Press has reported.
Wolozin, 40, used Ledger's phone to speed-dial Olsen after she shook him to
tried to wake him up and found that he was unresponsive. Olsen told the masseuse she would call security people in New York for help, but the masseuse called Olsen back to say she would call 911 herself, sources say.
Police have said they will not
in connection with the phone calls.
Ledger, 28, and Olsen, 21, first met in the summer of 2006 and "were
casually dating" before the actor's death, according to a source.