The alleged gunman in Thursday’s shootings in Chattanooga, Tennessee, is Muhammad Youssef Abdulazeez, according to two sources briefed on the case. He was born in 1990, a law enforcement official said. U.S. authorities are increasing security at federal facilities “out of an abundance of caution” after a shooting on Thursday in Chattanooga, Tennessee, that killed four Marines, Homeland Security Secretary Jeh Johnson said. The Department of Homeland Security is closely monitoring the shooting and supporting the FBI investigation, Johnson said in a statement. He cautioned “there are many unconfirmed and possibly false reports about events.”
