Azerbaijan Airlines, the carrier of the passenger jet that crashed in Kazakhstan on Christmas Day, said preliminary investigations have found the disaster occurred “as a result of physical and technical external interference,

Experts say evidence in the Azerbaijan Airlines plane crash in Kazakhstan points to a possible midair explosion, not an encounter with a flock of birds.

An oxygen tank on the Azerbaijan Airlines flight exploded before the plane crash, Kazakhstan's transport minister said. It adds a little more detail to the series of events leading to the fiery crash landing of the Embraer 190 on Christmas Day that killed 38.