Brooklyn

Police yesterday were searching for the gunmen who robbed a string of businesses in Bedford-Stuyvesant and Crown Heights.

The suspects (one of whom is pictured above) robbed a Sprint Wireless cellphone store 1271 Fulton St., a Family Dollar Store at 308 Franklin Ave. and a Family Dollar Store at 861 Park Ave. between July 6 and July 24, cops said.

In each case, one of the thieves pulled a gun, demanded cash and fled with the money.

A man was being questioned yesterday in the death of a 3-year-old girl who died in his care in a Brownsville apartment, police said yesterday.

Cops responded to a 911 call reporting an unconscious child in a ground-floor apartment on MacDougal Street near Saratoga Avenue shortly after midnight yesterday, cops said.

The girl was rushed to Interfaith Hospital, where she died at 1 a.m.

A second child, age 1, was also hospitalized, sources said.

Cops yesterday were questioning the man, whose name was not released, who had been in the apartment with the children.

The medical examiner will determine the cause of death, police said.

A mystery gunman killed a man on an East Flatbush street, police said yesterday.

The suspect for unknown reasons repeatedly shot the 32-year-old man in the head and torso on East 51st Street near Rutland Road at 2 a.m. Tuesday.

The victim was rushed to Kings County Hospital, where he died.

Manhattan

Police are hunting the would-be bank robber pictured above.

The crook passed a note to a teller in the HSBC branch at Broadway and Chambers Street at 1 p.m. Tuesday.

But when the teller left her station, the nervous suspect fled empty-handed.

He was dressed in a multi-colored short-sleeved polo shirt, light blue jeans and white tube socks, and was carrying a dark knapsack.

The Bronx

A man was killed in Morrisania in a hail of gunfire that also left a 13-year-old boy wounded, police said yesterday.

The 20-year-old man and the boy were arguing with a gunman on East 165th Street near Trinity Avenue at 11:30 p.m. Tuesday, cops said.

Suddenly the gunman opened fire, hitting the 20-year-old in the head and the boy in the arm and thigh. The boy was rushed to Lincoln Hospital, where he was listed in stable condition.

Staten Island

A Stapleton woman was arrested for stabbing her sister-in-law in an argument over the arrest of the suspect’s brother, authorities said yesterday.

Pamela Moore, 47, allegedly plunged a knife into the arm of the 40-year-old victim in Moore’s Warren Street apartment at Fulton Street at 9 a.m. on Aug. 5.

When Moore tried to remove the knife, the blade broke off in the victim’s arm.

The victim underwent surgery at Staten Island University North Hospital, who notified police.

A spokesman for DA Daniel Donovan said Moore was charged with assault.