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No injuries after transformer catches fire at Hoover Dam

11:36 a.m.

A transformer fire at Hoover Dam that bystanders caught on camera has not affected operations there, officials say.

"There are no injuries to visitors or employees; there is no risk to the power grid and power is still being generated from the powerhouse," according to a statement from the regional director of the Bureau of Reclamation's Lower Colorado Region.

The transformer caught fire at about 10 a.m. on Tuesday and was extinguished within 30 minutes by the Reclamation/Hoover fire brigade.

The cause of the fire was not immediately available.

11:19 a.m.

Police in Boulder City, Nevada, say they are headed to the Hoover Dam after reports of an explosion Tuesday morning. Videos posted on social media showed what appeared to be a fire or explosion in a building near the base of the dam.

A huge plume of black smoke swirled above the building.

The city of Boulder City posted on its Twitter account that the fire was extinguished before the fire department arrived. It referred additional questions to the Bureau of Reclamation and Hoover Dam.

Calls to the bureau and to police at the dam seeking additional information were not immediately returned.

This is a developing story. Check back for updates.

Lindsey Collom Riley is assistant news director at KJZZ. She joined the team as a senior editor June 2022 after more than two decades of reporting and editing for print/digital news in metro Phoenix.