LOUD NOISE, SMOKE, OXYGEN MASKS
Awale Kullane, Somalia's deputy ambassador to the UN who was on board the flight, said on Facebook that he "heard a loud noise and couldn't see anything but smoke for a few seconds."
When visibility returned they realised "quite a chunk" of the plane was missing, he wrote.
Mr Kullane, who was going to Djibouti to attend a conference for diplomats, also posted a video (later removed) showing some passengers putting on oxygen masks inside the plane.
"We don't know a lot, but certainly it looks like a device," said John Goglia, a former member of the US National Transportation Safety agency and aviation safety expert.