Security threat halts flights at Washington's Ronald Reagan airport, FAA says

All flights into and out of one of the United States' busiest runways were halted Tuesday due to a security threat, the Federal Aviation Authority said.

Authorities were investigating a reported bomb threat involving an aircraft at Ronald Reagan National Airport in the Washington, D.C., area, a law enforcement official said. The aircraft was moved to an isolated area of the airfield in line with security protocols. The official spoke to The Associated Press on condition of anonymity because they could not publicly discuss details of the ongoing investigation.