Police said Manhattan real estate developer David Winoker, 49, and skydiving instructor Alexander Chulsky, 25, of New York City were killed during a jump Friday afternoon near Gardiner, The (White Plains) Journal News reported.
While witnesses at the scene told police it appeared there was a parachute malfunction, the skydiving school's owner told YNN Hudson Valley reported the chute had opened properly.
The cause of the accident was being investigated.
Friends said Winoker was skydiving as part of a friend's 50th birthday party, the newspaper said.
Jordana Brewster on Paul Walker: 'He was an enormous presence in my life'
Beyonce flaunts bikini body, Blue Ivy in vacation pics