Cops are now hunting for four suspects in a brutal Upper West Side attack that left a woman with a fractured face.

The victim, 57, was walking on a sidewalk shrouded in construction scaffolding on 68th St. and Amsterdam Ave. around 10:30 p.m. Thursday when two hooded individuals approached her from behind, said cops, who released surveillance images of the suspects.

The surveillance footage shows one attacker –– possibly a woman –– smacking the victim on the side of the head before running away, causing her to collapse.

A second suspect then violently drags the woman out of view, video shows.

The third and fourth suspects then allegedly approached the women as she laid on the ground and tried to steal her purse, cops said, but the victim managed to hold onto her bag.

The woman was taken to St. Luke’s Roosevelt Hospital where she was treated for fractured bones on her face.

All suspects are believed to be in their late teens or twenties, authorities said.