Three thugs grabbed a young woman waiting for a bus on the Upper East Side early yesterday and dragged her into Central Park, where she was sexually assaulted and robbed, cops said.

The 23-year-old victim told cops the attack took place about 300 feet inside the park near East 86th Street at around 3:20 a.m.

The woman, who lives in a Bronx homeless shelter, ran out of the park seminude. She was spotted by a cabdriver, who gave her a shirt and called 911.

She was treated at a hospital.

Sources said she appeared to be intoxicated.

Cops released video images of three suspects in a nearby drugstore around the time of the alleged attack.