PM says 3 terrorists opened fire then blew themselves up and says ISIS are to blame.
One video shows people beginning to run followed 5 seconds later by an explosion.
Another video below, shows an internal area with the public fleeing, a policeman shooting a terrorist, who falls to the floor, 10 seconds later he explodes as the policeman retreats out of frame.
https://instagram.com/p/BHNqhywAZsN/
Still photos show victims laying where they were shot or injured by bomb blast outside the terminal.
Eyewitness says terrorist opened fire near him inside departures hall, then took escalator down stairs when he head more gunshots and an explosion. (possibly it was that explosion caught on camera in the above link)
Mickjoebill