Police are looking for the killers of two Brooklyn teenagers who were stabbed to death in separate incidents about a block apart in the Crown Heights section late Wednesday, officials said.

Jamal Joseph, 18, suffered numerous stab wounds to his leg and back when he got into a fight with an older man near 249 Utica Ave. shortly before 7 p.m. on Wednesday, the NYPD said. Investigators said the fight appeared to start after Joseph and the attacker jostled each other while walking, and then exchanged hostile words.

Joseph, who lived at 488 Berriman St., collapsed in a sneaker store and was taken to Kings County Hospital Center where he was pronounced dead, police said. Investigators are examining surveillance camera recordings for clues but as of late Thursday had made no arrest.

advertisement | advertise on newsday

photosRecent NYC mug shotsDataNYC crime rates

In a second incident John Garrett, 17, was found stabbed in front of 1063 Eastern Pky. after police received a report of an assault in progress about 10:30 p.m. Wednesday. The site of the second stabbing was about a block away from where Joseph was attacked. Garrett also was taken to Kings County Hospital Center where he was pronounced dead.

Investigators believe Garrett, who lived at 1280 St. Johns Place, may have been assaulted at 1120 Eastern Pkwy., according to a law enforcement official. As in the Joseph case, police have not made an arrest in the Garrett homicide. Investigators said they do not believe the stabbings are related.