MIAMI -- We're learning more details about today's fatal shooting on a jetway leading from an American Airlines plane in Miami.
A passenger on the plane tells television station WTVJ she saw a man running "frantically" up the aisle before he was shot. Mary Gardner says a woman, apparently the man's wife, said the man suffered from bipolar disorder and hadn't taken his medication.
Gardner says four to five shots were fired.
A Homeland Security official says the passenger is dead.
Homeland Security Department spokesman Brian Doyle says the man was confronted after indicating there was a bomb in a carry-on bag.
Doyle says the passenger was shot while apparently reaching into the bag.