Federal aviation officials are reviewing an air-traffic safety incident Tuesday involving President Trump's Marine One helicopter. The president's helicopter took off from the White House Tuesday afternoon, but air-traffic controllers had not halted commercial flights at nearby Ronald Reagan Washington National Airport as required under safety protocols, people familiar with the matter said.

The incident raised concerns about potential safety risks given the proximity of the military helicopter to commercial air traffic at Reagan National Airport.

The investigation is being conducted by the Federal Aviation Administration to determine why standard safety procedures were not followed during the presidential helicopter operation.

No immediate safety breach was reported, but the review focuses on whether proper coordination occurred between military and civilian air traffic control systems.