In a press release Rockstar announced:

"Starting Tuesday, May 28th in North America and Wednesday, May 29th in Europe, our latest PS2 Classics release on PlayStation Network lets you navigate the treacherous path home for that real live bunch from Coney, as The Warriors will be available to plaaaa-ay on PS3. Grab it from the PlayStation Store next week for $9.99 / 9.99 euros / 7.99."