News reports are now saying authorities are investigating the five people who checked in but didnt get on the plane.
That's the first thing I thought was really odd. People don't check in and not get on. Book a ticket and not turn up maybe.....but go through check in, check your luggage in and not get on? Not so much.
Aviation law states if someone does this the bags must be removed from the hold. In practice this is a fairly big operation. Baggage handlers have to go into the planes hold and search through bags for all the suitcases. It will nearly always mean the plane misses its take off time and then has to wait for a slot on the runway.
Its the reason why you sometimes hear desperate appeals for named passengers to get to the gate.
Cynical me is wondering if the airplane just took off without removing the bags.