QUEENS

*** Police yesterday were trying to find a mentally ill man who disappeared from his Ozone Park home.

Shaun Rajpaulsingh (above), 23, who allegedly suffers from schizophrenia, left his 118th Street residence near 109th Avenue at 8 a.m. last Friday and has not returned, police said.

Rajpaulsingh is described as about 5-foot-6 and 120 pounds with a thin build, light complexion, brown eyes and black hair. He was last seen wearing a white T-shirt, dark green jeans and Nike sneakers.

BROOKLYN

*** A man was arrested after threatening to kill a security guard in a Williamsburg Social Security office, authorities said yesterday.

The incident began at 3:24 p.m. Wednesday when a worker told an impatient Darren Bazemore, 46, he had to wait his turn for assistance in the office at Broadway and Ellery Street, sources said.

The security guard, a 43-year-old woman, told him to take a number and sit down, but he refused and started screaming and cursing, sources said.

When the guard ordered him to leave and threatened to summon the police, Bazemore allegedly threatened to kill her, attempted to assault her, then fled.

Another security guard flagged down a police car and pointed out the suspect just down the street. Bazemore was charged with menacing, disorderly conduct and harassment.

*** A man struggled with arresting officers after exposing himself to a woman on a Park Slope street, authorities said yesterday.

The incident began at 1 a.m. Wednesday when Chad Rosen, 21, of Bellmore, L.I., allegedly grabbed the waist of a 24-year-old woman sitting next to him on a D train heading into the Fourth Avenue/Ninth Street station, sources said.

She pushed him away and departed the train with a friend, but saw him again a few minutes later from inside a Dunkin’ Donuts a block away.

The women saw Rosen expose himself, sources said. The suspect, whom witnesses described as extremely intoxicated, then allegedly cursed and shouted at the victims, who flagged down police.

After Rosen was arrested, he kicked a cop trying to put him in a police car. He was charged with public lewdness, disorderly conduct and resisting arrest.

Rosen told The Post he did not expose himself to the victims.

*** A 6-month-old boy died early yesterday after being found unconscious in a Bedford-Stuyvesant apartment, police sources said.

The tot, whose name was not immediately released, had gone into cardiac arrest by the time EMS and police arrived at the Patchen Avenue home near Madison Street at 1:15 a.m.

Sources said that the mother had fed him 15 minutes earlier and that afterward the baby stopped breathing. The tot was rushed to Woodhull Hospital, where he died.

Authorities said the body bore no visible signs of trauma.

*** An elderly man was found dead after he apparently fell and hit his head in his Cobble Hill apartment, police sources said yesterday.

The body of Anthony Scarpati, 94, was found with an eye laceration in his Henry Street apartment near Degraw Street at 2:20 p.m. Wednesday, cops said. Police sources said the injuries were consistent with a fall.

THE BRONX

*** A man was gunned down early yesterday in Mott Haven, police said.

Muhammad Jackson, 21, was shot several times at East 143rd Street and Third Avenue after a mystery gunman attacked him for unknown reasons at 2:55 a.m., police said.

The victim was rushed to Lincoln Hospital, where he died. The shooter fled.

*** Police yesterday were searching for three armed thieves who made off with cash in an East Tremont store holdup.

The suspects brandished firearms and a boxcutter when they walked into the Family Dollar Store at Third and East Tremont avenues at 6:15 p.m. on June 4, police said.

The trio fled with an unspecified amount of cash.

STATEN ISLAND

*** A Pathmark worker was arrested after a security guard caught him stealing veal and lamb chops in the New Dorp supermarket, authorities said yesterday.

The guard saw Angel Quiñones, 37, swiping the meat in the market on Hylan Boulevard at Lindbergh Avenue at 5:23 a.m. Wednesday, sources said.

He was charged with petit larceny, said a spokesman for DA Daniel Dononvan.