After a seven-day stretch in which no homicides were recorded in New York City, five occurred in 10 hours on Friday and Saturday, and another person was killed on Sunday morning.

Four killings occurred in the Bronx, and two in Brooklyn. As of Sunday morning, no arrests had been made.

Despite the six homicides, the number of killings this year is down over 25 percent compared with 2012. And last year, the city recorded its lowest annual homicide total, 419, in at least half a century.

The first killing occurred at 6 p.m. on Friday in the South Bronx. Two friends were standing in front of 680 Tinton Avenue near the John Adams Houses when a gunman opened fire, the police said. Tyrek Singleton, 28, of the Bronx was shot in the torso and pronounced dead at Lincoln Medical Center.