A 15-year-old boy was fatally shot and a 16-year-old was wounded in a Brooklyn apartment building Tuesday, sparking an investigation into whether the bloodshed was connected to a robbery earlier in the day,

Officers responded to 80 E. 93rd St. around 3:30 p.m. and discovered a 15-year-old boy, in the building lobby, with a gunshot wound to the head.

The teenager, Heath Campbell, was shot in the head, the police said. Another boy, 16, who has not been identified, was shot in the shoulder and was in stable condition.

A Brooklyn community is mourning the loss of 15-year-old Heath Campbell, a high school sophomore whose life was cut short by gun violence in East Flatbush. A vigil was held as family, friends, and anti-gun violence advocates gathered to support Heath’s grieving mother,