The FBI thwarted a potential mass shooting by a teenager who planned to set off an explosive at a shopping mall in Washington state and shoot people as they fled the movie theater there, law enforcement leaders said Thursday.

An Oregon teen has been arrested in connection with an alleged mass shooting plot targeting the Three Rivers Mall in Kelso, in southwestern Washington, officials said.

The FBI derailed a plot by a teenager who had planned to detonate a bomb at a Washington state shopping mall and shoot people as they fled a movie theater in the building, law enforcement authorities announced Thursday.