The FBI and local authorities arrested a teen who allegedly planned a mass shooting with improvised explosives at a Washington state shopping mall.

A teenager in Oregon planned to set off an explosive at a shopping mall in Washington state and shoot people as they fled the movie theater there, said law enforcement officials, one of whom said the plot "was as serious as it gets.

Authorities thwarted a planned mass shooting and bombing at a mall in Kelso, Washington, with the arrest of an Oregon juvenile who had detailed intentions to carry out the attack.