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White House on alert after nearby fire, suspicious vehicle

The north lawn of the White House is seen under a blanket of snow March 6, 2015, in Washington.

MANDEL NGAN/AFP/Getty Images

Last Updated Mar 7, 2015 12:25 PM EST

WASHINGTON -- The departure of President Obama and the first family was briefly delayed by a vendor cart fire and a suspicious vehicle near the White House Saturday.

They were heading to Selma, Alabama, for a historic 50th anniversary march. Reporters at the scene heard a loud noise before they were led back inside.

Secret Service spokesman Brian Leary says a vendor cart caught fire around 10 a.m. at 15th and G streets. Firefighters responded and contained the blaze. D.C. Fire and EMS says one patient was evaluated but wasn't taken to a hospital.

Around the same time, Leary says a bomb-sniffing dog detected something on a vehicle nearby. That vehicle was checked out by the Secret Service and other officers. The vehicle was cleared at 11:48 a.m.

Mr. Obama and the first family were driven to Joint Base Andrews in Maryland and were on board Air Force One at around 11:40 a.m.