Fourth worker dies after fireworks explosion (updated 7:36 p.m.)

OCRACOKE - Five people working on Independence Day fireworks shows were killed by explosions this weekend, four of them by a single blast that rocked Ocracoke Island, a remote village along the Outer Banks.

Police say the fifth died after an explosion at a fireworks show in eastern Pennsylvania and, elsewhere, about 25 people were injured when a pedestrian bridge collapsed at festivities in northwest Indiana, authorities said.

The North Carolina workers were unloading fireworks from the truck when it blew up Saturday, catching the attention of residents and tourists across Ocracoke. Agents from the Bureau of Alcohol, Tobacco, Firearms and Explosives were on the scene Sunday investigating.

Dock master Robert Raborn noticed the workers unloading the truck and said the explosion as one of the loudest things he has ever heard.

"It was like 40 minutes worth of fireworks going off in four seconds," Raborn said.

Authorities have not released the names of the workers, four men and one woman.

The crew worked for Melrose South Pyrotechnics near Rock Hill, S.C. The company said in a statement it had sent an official to work with investigators.

In Pennsylvania, state police fire marshals are investigating the death of a worker killed Saturday evening at the start of a fireworks grand finale at Quakertown's Memorial Park. Police Chief Scott McElree said "some kind of explosion" occurred and the show was immediately halted and part of the park evacuated.

The man was pronounced dead at a hospital. His name, age and hometown have not been released.

In Merrillville, Ind., the collapse of a wooden pedestrian bridge after a fireworks display sent at least 50 people into water and injured about 25 Saturday night, police said. No one was reported missing and none of the injuries was life-threatening, authorities said.

The roughly 90-foot bridge collapse occurred at Hidden Lake Park in Merrillville, about 45 miles southeast of Chicago.

Ross Township firefighter Perry Herzog told The Times newspaper of Munster that emergency workers had to rescue "quite a few people" from the water.

Witnesses described a chaotic scene, adding the bridge was full of people before it fell. Police estimated the crowd at about 10,000 people and said a preliminary investigation showed a "structural failure of the footbridge."

"People were grasping and hanging onto the bridge itself," Robert Walker, of Merrillville, told The Times.