Three military planes flying in tight formation crashed Saturday during Mexican Independence Day festivities, killing at least four crew members, defense sources said.
One crew member parachuted to safety and remained hospitalized later Saturday. A sixth was missing, the sources said.
The planes collided as they flew through a canyon in western Mexico City, out of sight of residents who had been watching 121 military planes perform in celebration of the 185th anniversary of Mexican independence.
Witnesses heard a huge explosion and saw a column of black smoke rise from the site of the crash. Television footage showed pieces of the airplanes strewn about an open field.