India, Aug. 6 -- A mid-air safety scare was reported from Washington DC as US President Donald Trump's helicopter - Marine One - flew close to a commercial flight in the national capital.

The incident occurred as Marine One departed from the White House for Andrews Air Force Base at the same time an American Airlines flight took off from Ronald Reagan Washington National Airport.

Describing the incident as a "loss of separation" event, the National Transportation Safety Board and the Federal Aviation Administration have launched a probe as to why commercial planes were not halted as the President's chopper took off.

In aviation, a loss of separation occurs when two aircraft come closer together than the allowed safety minimum distance ...