Manhattan

Police combed through Gramercy Park late yesterday in search of surveillance video that might help identify a gang of thugs involved in an early-morning assault.

Cops responding to a call on East 22nd Street near Park Avenue at 4:15 a.m. found a 27-year-old man with severe head injuries.

Up to seven other men had been seen running from the scene, police said. Sources said the assailants were angry about a conversation between the victim and a woman in a nearby club.

The victim was listed in stable condition at Bellevue Hospital.

Bronx

A man died of an apparent heart attack while struggling with police trying to arrest him for trespass in Claremont.

Cops were called to the Volunteers of America shelter on Webster Avenue near East 165th Street at 11 p.m. Friday by an administrator who said the man, who was not a resident, had entered and exited the building several times that the day.

Officers tried to wrestle him into custody, but he lost consciousness and went into cardiac arrest, a police source said.

EMTs performed CPR at the scene, and the man was taken to Lincoln Hospital, but he died shortly thereafter.

Police sources said he weighed 200 pounds and suffered from high blood pressure and diabetes.

The Medical Examiner’s Office is to determine a cause of death.

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A woman awoke to a nightmare as her ex-boyfriend viciously attacked her and her kids in their West Farms home, authorities said.

“You got 20 minutes to give me my money. I’m gonna break your f–king ass up,” Michael Nelson, 25, allegedly barked before throwing a chair and a fan at his ex at 6:30 a.m. June 4 in her Elder Avenue apartment near East 172nd Street.

Cops said he also beat the woman with an aluminum bat, then hit her daughter, 15, in the face with the bat and pushed the woman’s 6-year-old son through a doorway.

Nelson was arrested Wednesday, police said. on charges of assault, menacing, and endangering the welfare of a child.

The family was treated for injuries at a local hospital.

Brooklyn

An ex-con went berserk and turned a restaurant in Brighton Beach upside down, cops said.

A worker at Tatiana’s, on the boardwalk at Brighton Sixth Street, found Adrian Robinson, 41, asleep in a lower-level bathroom at 1 p.m. Wednesday, cops said.

The worker roused Robinson, who allegedly punched him in the face.

Restaurant employees removed Robinson from the premises, but he broke down the back door and stormed back in, cops said.

He allegedly hurled fire extinguishers into showcases containing premium booze, tossed artificial trees into partitions, and smashed several picture frames before throwing a chair at the manager and locking himself in the kitchen.

He was eventually arrested.