By Walt Hunter

PHILADELPHIA (CBS) –The manhunt is on for a lone gunman who burst into a Northeast Philadelphia apartment this morning, shooting a teenager to death.

Captain James Clark, who heads the Philadelphia Police Homicide Unit, says Shaquelle Abraham was shot once in the chest by a killer who kicked down the door of his apartment and opened fire.

Clark says the gunman then fled without taking anything and while the motive isn’t clear, Clark believes Abraham was the intended target.

Neighbors say Abraham had grown up on the block and was just moving back into an apartment when he was killed.

The victim’s mother, who had just left the apartment, only to be called back with word of her son’s murder, collapsed in the street and was cared for by medics.

“I don’t have the least idea why they’d want to kill him,” Abraham’s stepfather told Eyewitness News. “He’s a good boy…just got a job, and just got his own apartment.”

“It’s crazy,” neighbor James Robinson said. “Young man finally got his life together, getting his own apartment, about to do the right thing…that someone would take his life for nothing — senseless.”

Police are not putting out any description of the killer but they are asking anyone who may have seen a four-door red Volvo racing from the scene in the 9400 hundred block of Fairgreen Lane to contact them.