Article: Cause found in firework blast: investigators said a "salute" fell and detonated in the Upper Merion crowd, injuring 15 people, 1 seriously, during a July 4 show.

Byline: Bonnie L. Cook

Jul. 6--The blast that injured 15 onlookers during Fourth of July fireworks in Upper Merion was caused by an "errant projectile" that fell during the township display into the crowd before exploding, authorities said yesterday.

Police and township officials said a fuse that should have caused a fireworks device called a "salute" to go off in midair during the show's finale did not trigger on time.

Instead, the apple-sized device, which appears as a loud white bang when it bursts in the air, detonated after falling to the ground.

Authorities credited the 11-year-old son of the township's cable-TV director for ...

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