MANHATTAN

*** Nearly three dozen bicyclists participating in a monthly ride around the city were arrested last night for violating the rules of the road, cops said.

The 33 riders – part of the Critical Mass environmental demonstration that takes place on the last Friday of every month – were arrested for riding against oncoming traffic, ignoring stop signals and other violations, according to NYPD spokesman Paul Browne.

Nearly a dozen of the arrests came at the corner of 11th Street and Sixth Avenue.

Cops said several of the arrests came when the riders, who started their rally in Union Square Park, splintered off the pre-negotiated route.

*** A 74-year-old man who jumped to his death from a lower Fifth Avenue apartment building Thursday was tentatively identified as a retired college professor, sources said.

The victim, whose name was being withheld pending notification of family, jumped at about 10:30 p.m. from the roof of his apartment house at 41 Fifth Ave., near West 11th Street, into a rear courtyard. Cops believe the dead man, who lived alone, taught at the Parsons School of Design, from where he retired nearly 15 years ago.

QUEENS

*** A 911 call about a fight in an Astoria apartment resulted in the arrest of four people on charges of possessing forged identification cards and other phony documents.

Police received a call about 2 a.m. reporting a fierce dispute inside a second-floor apartment at 25-74 37th St.

Officers entered the apartment where they noticed counterfeit Social Security cards, immigration papers and other phony documents.

The cops arrested the four occupants on forgery charges and for criminal possession of forgery instruments and possession of a forgery device.

They were identified as Bernake Barrada, 23; Hector Juarez, 31; Evaluz Barrada, 17; and Epifania Roman, 21.

Cops said they suspect the phony documentation was created for their own use and that the suspects also may have sold sham documents to others.

The investigation was continuing.

*** A 25-year-old woman walking on Rego Park street was forced into an alley and raped by a gun-wielding thug early yesterday.

Police said the victim was walking “in the vicinity” of Saunders Street at about 1 a.m. when she was attacked by a black man in his 20s, who fled after the assault. Cops had no further description of the assailant.

A thug robbed a Flushing candy shop at gunpoint yesterday, police sources said.

The suspect walked into the Gina Rose Candy Shop at 42-39 Main St. at 11:30 a.m., pulled out a silver handgun and forced a 32-year-old woman behind the counter to give him money, authorities said.

He made off with at least $1,000.

BROOKLYN

*** An East Flatbush man was arrested and charged yesterday with murder after he stabbed one man to death and slashed another across the face during a fight in his apartment.

Delroy Colville, 39, is accused of flying into a rage and pulling out a knife during a fight inside his third-floor apartment at 251 Martense St.

Colville allegedly pulled a knife and stabbed Gregory Gardner, 20, in the stomach and arms and slashed a 45-year-old man across the face.

Both men were taken to Kings County Hospital, where Gardner, who lives at 255 Martense St., was pronounced dead on arrival.

*** A 27-year-old man was shot outside a Bedford-Stuyvesant nightclub early yesterday, police sources said.

The victim, whose name was not released, told cops he walked from the Brown Sugar nightclub at 433 Marcus Garvey Blvd. when he was wounded at 3:05 a.m.

The victim told investigators the bullet that hit him in the right leg was fired from among a large group of men fighting nearby.

*** (Metro) A Williamsburg man swindled at least eight victims, including an 89-year-old woman, out of a total of $2,000 by claiming to be a health care worker who needed the money to verify their Medicare or Medicaid status, law-enforcement sources said.

David Matos, 39, of 60 Division Ave., also will be charged with attempted rape because he told four female home health aides that they needed to submit to gynecological exams by him to keep their jobs. Two complied, the sources said.