Several videos available now.
Yes, the number 2 engine came off as the aircraft slid along the ground.
A fuel explosion on the right wing, blowing off a large portion of the wing.
Metar:
OMDB 030900Z 11021KT 3000 BLDU NSC 49/07 Q0993 WS ALL RWY TEMPO 35015KT 1500
OMDB 030800Z 14012KT 100V180 6000 NSC 48/09 Q0994 WS ALL RWY TEMPO 35015KT 4000 DU