Police say Virginia blast isolated incident, suspect killed

A house explosion in the Washington, D.C., suburb of Arlington, Virginia, was an isolated incident and authorities are investigating concerning social media posts made by the suspect, who died in the blast, police said on Tuesday. Police identified the home's resident, James Yoo, 56, as the suspect in Monday night's explosion, which witnesses said shook nearby buildings and emitted a large tower of flames and smoke. Authorities on the scene determined that a man had fired a flare-type gun from inside the house 30 times, Arlington Police Chief Andy Penn said.