Bronx

A man and a teenager were being questioned by cops yesterday in connection with a shootout that killed a young mother who pushed her son to safety as bullets sprayed the street.

Police said the 25-year-old man and the 16-year-old youth are suspected of firing across the street at each other Tuesday afternoon.

A stray bullet cut down Aisha Santiago, 25, as she walked home from a Laundromat with her 9-year-old-son.

Brooklyn

What a gent! A road-raging motorist backed down when he discovered that the driver and passengers he was about to attack in East New York were women, sources said yesterday.

The suspect, Aaron Aiken, 29, was sitting in his 2004 Toyota at a light that had just turned green at Liberty and Lincoln avenues Tuesday afternoon when the impatient BMW driver behind him leaned on her horn, police said.

Armed with a slapjack, a short-tempered Aiken got out of his car ready to do battle, cops said, but took a chivalrous turn when he saw his foes were women.

“I thought you were men,” he allegedly said. “I was about to f – – – you up.” Still, Aiken landed in handcuffs and was charged with menacing and weapon possession, sources said.

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A teacher at a Midtown school helped cops nab a teen mugger by snapping a cellphone picture of him, authorities said yesterday.

At a school near 63rd Street and West End Avenue Monday, the teacher was standing with a 16-year-old student who had been mugged back in June.

The student recognized a nearby teen, Albert Pujols, 17, as the guy who had robbed him, sources said.

The victim told the teacher, who snapped the picture and called 911, police said.

Armed with the photo, cops grabbed Pujols.

The suspect, who had allegedly swiped cash and a BlackBerry from the victim at knifepoint, was charged with first-degree robbery.

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Two Chelsea cops took a licking, but kept on ticking.

They waded in to break up a fight among a half-dozen men at Seventh Avenue and 27th Street at 4:15 a.m. Monday, sources said.

One of the brawlers, Shareefe Watford, 20, allegedly punched a cop in the face, and the police sergeant with him suffered a separated shoulder trying to stop the blow.

Watford was charged with assault and resisting arrest. The other men fled.

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An ex-con was busted for swiping $6,000 from a Midtown construction worker in a gunpoint robbery, police sources said yesterday.

Kimaro James, 27, and an accomplice allegedly followed the 46-year-old victim into an elevator at a construction site on 37th Street near Eighth Avenue at 4:15 p.m. on Aug. 29.

One of the men pulled a gun, threatened to kill the victim and swiped the money and two cellphones, sources said.

James, who had served seven years for robbery, fled with his accomplice, but was picked up Tuesday and charged with robbery, sources said. The accomplice is still at large.

Staten Island

A squatter bickering with two other indigents tossed scalding water on them in Port Richmond, cops said yesterday.

Kelly Brock, 48, clashed with two brothers in the abandoned building on Degroot Place near Taylor Street at 8 a.m. Saturday, sources said.

The suspect allegedly grabbed a pot of boiling water and hurled it at the men.

Brock was charged with assault and weapon possession, said a spokesman for DA Daniel Donovan.

Queens

A 19-year-old woman is lucky to be alive.

She was standing outside a building on 119th Avenue near 152nd Street Tuesday night when shots rang out and she was hit in the back.

She was rushed to Jamaica Hospital with non-life-threatening injuries.