According to a Department of Homeland Security Official, American Airlines Flight 924 was in Miami on a stopover during a flight from Medellin, Colombia, to Orlando, Florida, when the man said there was a bomb in his carry-on luggage.

Federal air marshals pursued the man down the boarding bridge and ordered him to get on the ground, the official said.

When the man appeared to reach into his baggage, at least one shot was fired by the marshals, wounding and killing him, officials said. No explosives were found in the man's bag.

This is the first time an air marshal has fired a weapon on or near an airplane, a federal official said.