Seven of NYPD’s Finest injured amid Occupy Wall Street chaos

At least seven cops were hurt during violent clashes with protesters on Thursday, officials said.

In the most bloody injury, a demonstrator hurled a star-shaped piece of glass — possibly taken from another protester’s Captain America costume — at Officer Matthew Walters during a 1:30 p.m. confrontation at Zuccotti Park, officials said.

The glass sliced Walters’ hand. He later needed 20 stitches to seal the wound, officials said.

Walters, 24 — a rookie assigned to the 81st Precinct in Bedford-Stuyvesant, Brooklyn — was taken to Bellevue Hospital and his assailant avoided capture, officials said.

At about the same time, an officer was doused in the face with a liquid that police believe was vinegar.

His eyes were flushed at the scene and he was taken to New York Hospital Downtown for treatment.

Earlier in the day, four other officers were splashed with a similar substance during a standoff at Broadway and Wall St. They, too, were treated and released from New York Downtown Hospital.

Another officer was treated at Bellevue Hospital for a minor injury to his hand.

At least 10 protesters were also hurt during the chaotic day, but none was seriously injured, officials said.