New York City reached a record-tying 12 days with no murders — a streak only ended when a 38-year-old man was shot in the stairwell of a Bronx NYCHA building, police said Monday.

Gregory Stewart was shot in the head about 9:05 p.m. Sunday inside a Sotomayor Houses building on Watson Ave. near Rosedale Ave. in Soundview, cops said. Medics rushed the victim to Jacobi Medical Center but he could not be saved.

Stewart’s murder ended a stretch of 12 days, beginning Nov. 25, that saw no new recorded homicides citywide. The only other time the city is known to have gone that long with no murders was in 2015, which also saw a 12-day stretch with no homicides, according to NYPD stats.

“Right strategy. Great execution. That’s how you set record after record,” NYPD Commissioner Jessica Tisch said in a statement Monday. “Thank you to the members of the NYPD who have sacrificed so much this year to drive down violent crime to record lows.”

A man was taken into custody in Sunday’ slaying but has not yet been charged. The victim lived in the Wakefield section of the Bronx, according to cops.

The last known murder in the city before Sunday’s homicide was the stabbing death of 80-year-old Lev Vayner inside his apartment on Overlook Terrace near W. 184th St. in Washington Heights on Nov. 24.

The suspect, 45-year-old Alon Riabichev, whom Vayner was kindly letting crash with him, called 911 around 3:15 a.m. and confessed to having killed Vayner, according to prosecutors. Riabichev is charged with murder.

A suspect has been arrested upstate for the Midtown Manhattan shooting that wounded Jets player Kris Boyd last month, law enforcement sources said Monday.

The 20-year-old suspect was not immediately charged but sources say he is expected to face charges of attempted murder after he is transported to Manhattan from Amherst, a Buffalo suburb where a U.S. Marshals task force nabbed him.

The suspect lives in the Bronx and has four prior arrests, including one last year for reckless endangerment and a 2018 robbery arrest as a juvenile delinquent that was sealed, law enforcement sources said.

The gunman early on Nov. 16 was part of a group of men who mocked the stylish clothes Boyd and his friends were wearing when they arrived at Sei Less, a W. 38th St. Asian fusion hot spot popular with the well-heeled.

Boyd and his friends, including fellow Jets players Irvin Charles and Jamien Sherwood, ignored the taunts, police said, but left the club after a short while and were mocked again by the same group, sparking an argument that got physical.

Boyd was shot in the chest, the bullet travelling into his lung, as the fight escalated.

The shooter and his accomplics ran off, police said, with the shooter later identified after cops released surveillance footage of him in the hopes someone would recognize him.

The suspect’s name has not been publicly released as detectives worked to establish probable cause to charge him.

Boyd was rushed to Bellevue Hospital and later released but was returned to the hospital over Thanksgiving after facing setback in his recovery, he posted on social media,