Kentucky plane crash: death toll rises to 11 as investigators search for answers

NTSB agents arrive in Louisville to investigate what caused engine to fall off UPS cargo plane and left wing to catch fire

A federal investigator said a UPS cargo plane's left wing caught fire and an engine fell off shortly before it crashed and exploded into a fireball in Louisville on Tuesday night, killing at least 11 people and injuring 15 with some people still unaccounted for.

At least 28 National Transportation Safety Board agents arrived at the site in Kentucky and began searching for clues about the possible cause of the disaster, which saw the UPS plane crash shortly after takeoff at the Louisville Muhammad Ali international airport, leaving behind a fiery trail of destruction on the ground and a huge plume of black smoke.