Detectives are investigating the death Wednesday afternoon of a 4-year-old boy in a North Philadelphia rowhouse, police said.

Police were notified by St. Christopher’s Hospital for Children that the boy had been brought to the emergency room by family members with a wound to his midsection, said Chief Inspector Scott Small. He was pronounced dead at 3:46 p.m.

The family told police the boy’s abdomen was punctured by flying glass after a picture frame fell from a wall and shattered in the home on the the 3200 block of North Reese Street.

Crime Scene Unit officers entered the house to collect evidence, Small said.

The boy’s mother was home at the time with two other children, police said.