Andrew Embiricos in 2008
The grandson of '40s film star Rita Hayworth
was found dead in his New York City apartment Sunday night, and authorities say the cause of death was likely suicide.
Andrew Embiricos, 25, was discovered in his bed with a plastic bag over his head, a source told the New York Post
"Of course Princess Yasmin Aga Khan and her former husband are deeply saddened by the death of their son Andrew Embiricos in New York on Sunday night," a spokesperson for the Aga Khan Foundation tells PEOPLE. "They would really appreciate if their privacy would be respected in the very difficult moment."
The son of Hayworth's daughter, Princess Yasmin Aga Khan
, and Greek shipping heir Basil Embiricos, Andrew received a degree in psychology from Fordham University and contributed to the research efforts of the Alzheimer's Association, according to his official website
. (Hayworth died of complications from Alzheimer's in 1987.)
But he also struggled with drug addiction and had a history of suicide attempts, sources told the Post
. In 2007, it was discovered that Embiricos had posted several pornographic videos of himself online.
"He was always a sweet charming guy," Michael Musto of New York's Village Voice
tells PEOPLE. "He once sent me a box of chocolates after I wrote something about him. He grew up with a certain properness because he was obviously the grandson of a screen legend and was mildly rebelling against that in certain ways but was always trying to do the right thing."
"Andrew seemed upbeat lately, according to my sources," Musto says. "He liked his job and was planning a trip to London. His death came as a shock. He always radiated charm and personality, even when weathering some dark crises."
Results of a toxicology report are pending.