Fire, rioting breaks out at Siberia prison Russian officials say a large fire is blazing at a prison in Siberia where inmates and guards have clashed

MOSCOW -- Russian officials said a large fire was blazing Friday at a prison in Siberia where inmates and guards have clashed.

There was no official information about casualties or damage at the prison in Angarsk, 4,000 kilometers (2,500 miles) east of Moscow.

But Pavel Glushenko, a local human rights activist, said on social media that “full-scale hostilities” were taking place at the maximum-security prison.

Details were unclear about what set off the clashes, with reports either that prisoners attacked guards or that a guard beat a prisoner.

State news agency RIA-Novosti late Friday cited a local official as saying the fire covered about 30,000 square meters (300,000 square feet) but had been localized.

The prison holds about 1,200 inmates.