Brooklyn

The NYPD smashed a drug ring after making 91 undercover buys from the Bedford-Stuyvesant crew.

Investigators from the Brooklyn North Narcotics Unit purchased crack from gang members in building hallways, lobbies and on the street, police sources said.

Cops moved in Wednesday morning and rounded up six suspects, including Corey Evans, who was found at his Brownsville home in possession of a MAC-11 machine pistol, a loaded .25-caliber handgun and 16 rounds of live ammunition, the sources said.

Also nabbed was Doreen Mackins, who had in her possession 40 “twists” of crack cocaine and $1,200 in cash, the sources said.

Four others were apprehended, and cops yesterday were hunting four additional suspects.

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Just call them the three stooges.

Cops employed K-9 dogs and a police helicopter to search for three crooks in Midwood, only to find them an hour later back at the crime scene, said law-enforcement sources.

Jeffery Francis, 32, Steve Escobar, 20, and Kendall Smith-Alexander, 21, were spotted at 3 a.m. Tuesday on East Ninth Street near Avenue L, allegedly removing running boards from a parked bus belonging to the Bais Ezra School for the disabled.

The witnesses, volunteers with the Flatbush Shomrim civilian patrol group, called 911, and the thieves bolted as a squad car approached.

Officers called reinforcements to aid in the manhunt, and, after about an hour, two suspects were found cowering in the bus, cops said.

A third suspect was caught on foot nearby. All three were charged with auto stripping, said authorities.

Queens

Police are hunting a gun-wielding gas-station robber.

He first struck on March 10 at 5:40 p.m., robbing a Mobil station on Northern Boulevard near 147th Street in Flushing.

He next struck on March 24 at 5:20 p.m. at the Gas Sale station on Horace Harding Expressway near Utopia Parkway in Fresh Meadows.

In both robberies, he flashed a firearm and fled with an undisclosed sum of cash.

Staten Island

An Emerson Hill woman was so intent on completing her taxes, she failed to notice her infant son had wandered from their home and into traffic, authorities said.

Lauren Ayala’s 1½- year-old son was found in a diaper and T-shirt, crawling down the middle of Manor Road near Brielle Avenue at 12:37 p.m. Wednesday, according to court papers.

A good Samaritan scooped up the child, and reportedly had to wait more than 20 minutes before Ayala, 21, arrived at the scene looking for her child.

“I didn’t notice he was missing. I was working on my taxes,” Ayala told arresting officers, according to court documents.

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A jewel thief swiped $27,000 in baubles from a Richmond Valley jewelry store, authorities said.

Dominick Tocci, 38, walked into Venice Jewelers on Page Avenue near Amboy Road at 11:24 a.m. Saturday, distracted an employee and allegedly snatched a diamond ring and diamond gold chain from a display case.

Tocci, who in November was busted for DWI in Brooklyn, was collared Wednesday and charged with grand larceny.

The jewelry was turned in by a woman believed to be Tocci’s accomplice, but investigators can’t prove she participated in the theft, authorities said.

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A gang of youths attacked two foes aboard a crowded city bus

in Tompkinsville as stunned passengers looked on in horror, authorities said.

Jacquille Pender, 17, and six pals allegedly set upon two victims, ages 20 and 22, at 8:45 p.m. Wednesday on an S74 bus on Victory Boulevard near Bay Street.

The crew, wielding boxcutters, slashed the two men on their faces, backs and arms. The victims went to Richmond University Medical Center, where Pender had also gone seeking treatment for a wound he suffered in the melee, authorities said.

He allegedly told doctors he had hurt his hand opening a can, but the victims quickly fingered him as one of the assailants.

The assault was in retaliation for a gang-related attack carried out by the two victims, both of whom have extensive rap sheets, authorities said.

Pender was charged with gang assault and weapons possession.