Big explosion in Tehran

The fire ball seen at night in Tehran

The fire ball seen at night in Tehran

The fire ball seen at night in Tehran

An explosion occurred east of Iran’s capital Tehran late Thursday, according to local media.

Footage shared on social media showed a bright orange flash followed by a large plume of smoke.

“Some local sources have reported a big orange flash east of Tehran. It is said to have occurred following a loud explosion.

Authorities have yet to issue a statement,” Iranian state television reported.

One Twitter post said the explosion occurred where there are many research institutes.

Tehran Deputy Governor Hamid Reza Goudarzi said an investigation has been launched.

Details later

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