A 14-year-old boy was shot twice in the chest yesterday in Harlem by a thug who had a previous dispute with the victim’s family, police sources said.

Tyreek Mangual was struck on West 147th Street at Seventh Avenue at around 3:40 p.m.

He was rushed to Harlem Hospital in critical condition.

Police sources said the bloodshed may have grown out of an earlier dispute that neighbors said involved the mugging of the victim’s mother and brother.

Police were searching for the gunman early today.