Police say an overnight fire at the Islamic Center of Fort Pierce, the Florida mosque that Pulse nightclub shooter Omar Mateen attended, was an act of arson.

Surveillance footage shows a person approaching the mosque "just moments before a flash is seen and the fire starts," the St. Lucie County Sheriff's Office says on Facebook.

The Associated Press

A documentary on a cell of the radical environmental group that claimed responsibility for the arson that destroyed a University of Washington research facility in 2001 has been nominated for an Oscar.

The documentary’s exploration of the ideology and tactics involved in radical environmental actions and the law enforcement agencies determined to make arrests raises again the intense passions and dramatic consequences surrounding the arson at UW.