Boulder City (US), Jul 19 (AP) No one was injured when a transformer at Hoover Dam briefly caught fire on Tuesday morning, officials said.

“There is no risk to the power grid and power is still being generated,” according to Jacklynn L. Gould, the Bureau of Reclamation's regional director for the Lower Colorado Region.

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The fire ignited around 10 am and was extinguished about half an hour later, she said.

Videos posted on social media showed what appeared to be a fire or explosion in a building near the base of the dam.

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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.

The cause of the fire is under investigation.

Hoover Dam is located in the Black Canyon of the Colorado River on the border between Nevada and Arizona.

According to the federal Bureau of Reclamation, the dam is 726 feet tall and 660 feet at its base, as long as two footballs fields measured end-to-end.

As many as 20,000 vehicles a day drive across the 45-foot wide top of the dam, which is a National Historic Landmark. (AP)

(The above story is verified and authored by Press Trust of India (PTI) staff. PTI, India’s premier news agency, employs more than 400 journalists and 500 stringers to cover almost every district and small town in India.. The views appearing in the above post do not reflect the opinions of LatestLY)