Boy, 7, shot and killed during Florida jet ski dispute; grandfather wounded while shielding child

A 7-year-old boy was killed and his grandfather was injured by a stray bullet when gunfire erupted during a Fourth of July dispute in Florida, officials said. 

The boy was killed by a gunshot wound to the head on Tuesday night, Tampa Police Deputy Chief Calvin Johnson said during a news conference. His grandfather was shot in the hand. 

The pair were at the Courtney Campbell Causeway west of Ben T. Davis Beach around 8:30 p.m. local time when two groups of people started arguing over jet skis being driven recklessly near where children were playing in the water, Johnson said. Members from each group opened fire.