Philadelphia boy, 3, in critical condition after being shot in head by six-year-old brother

Police in Philadelphia say a 3-year-old is in critical condition after being shot in the head by his 6-year-old brother.

Authorities say the younger boy suffered a gunshot wound to the left side of his forehead just after 3 p.m. Saturday. The two boys were on the second floor of their north Philadelphia home when the shooting happened.

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READ: 1 child is killed every day from an accidental shooting in the U.S.

The injured boy was taken to Temple University Hospital.

Investigators tell WPVI-TV in Philadelphia that they believe a 12-year-old brother also was at home, but no adults.