NEW YORK, NY - SEPTEMBER 25: New York Police Department Commissioner Bill Bratton speaks at a press conference announcing that there are no known terrorist threats to the New York City subway system on September 25, 2014 in New York City. Earlier today the Iraqi prime minister, in town for the United Nations General Assembly, said Iraqi forces had uncovered a plot by terrorists to attack the New York and Paris subway systems. (Photo by Andrew Burton/Getty Images)

NEW YORK (AP) — A New York City officer shot and killed a knife-wielding man who came at officers responding to a call about a domestic dispute Friday, police said, marking the third person to die in a police shooting in the city this week.

Officers were initially called to a home in the Sheepshead Bay section of Brooklyn around 5:30 p.m. to address a problem between 28-year-old Denis Volchkin and his mother, but he left before officers arrived, police said. They were called to the same home again around 8 p.m., when the mother escorted them inside.

The son lunged at the officers with a knife in hand, and an officer shot him once in the torso, police said. The two officers were taken to a hospital for tinnitus.

The confrontation came four days after police shot and killed two men — one accidentally — amid another domestic dispute in Brooklyn. In that case, one of the men, Francisco Carvajal, was carrying a knife and had pushed his way into his ex-girlfriend's apartment Monday night, police said. After Carvajal had shown up earlier that evening, she had called another man, Rafael Laureano, for help.

As Carvajal used the knife to cut through the door of the bathroom in which the woman had locked herself and her children, officers broke down the front door, and the unarmed Laureano bolted into the apartment, although a sergeant tried to stop him, police spokesman Stephen Davis said Thursday.

Carvajal tried to attack Laureano with the knife, and officers repeatedly ordered Carvajal to drop the weapon, police said. But instead, he came at them, and officers fired at least 10 times, killing both men, police said.

Nine rounds hit Carvajal; one hit Laureano in the back.