OCRACOKE, N. C. (AP)— Five people working on Independence Day fireworks shows were killed by explosions, four of them by a single blast that rocked this remote village on the Outer Banks islands.

The fifth died after an explosion at a fireworks show in Pennsylvania, police said.

In addition, a pedestrian bridge collapsed in Indiana as fans were leaving a fireworks show, injuring 25 people. Authorities said Sunday the crowd had overloaded the bridge.

The blast at Ocracoke came as workers were unloading fireworks Saturday from a truck at the Anchorage Marina, shaking homes and businesses across the southern end of Ocracoke Island and rattling residents and tourists.

Pennsylvania state police fire marshals were investigating the death of a worker Saturday at the start of the grand finale of fireworks at Quakertown’s Memorial Park.

At Merrillville, Ind., the collapse of a wooden pedestrian bridge dropped at least 50 people into a lake Saturday night and injured about 25 of them, police said. None of the injuries was life-threatening, authorities said.