080326_explosion4.jpgOne firefighter has been killed and a second firefighter and a civilian have been injured by a powerful explosion near Los Angeles Airport (LAX). No official cause yet, only that the explosion appears to have come from underground.

WESTCHESTER (KABC) — One of the firefighters injured in a Westchester explosion has died, according to Mayor Villaraigosa and the L.A. City Fire Dept. The other injured firefighter remains in critical condition.

The exact cause of the explosion has not yet been released. Officials say that the explosion appears to be related to a underground vault explosion. 

(photo credit: KABC-7)