Austrian lorry deaths: 'No ventilation' in lorry

Hungarian police say they have arrested four people over the discovery of the bodies of 71 migrants, thought to be Syrian, in a lorry in Austria.

The decomposing bodies were discovered by Austrian police on Thursday morning in the abandoned lorry, near the Hungarian border.

Officials said the victims probably died after suffocating in the vehicle.

James Reynolds reports from a customs building where the lorry was towed, and where forensic teams worked through the night to examine the bodies.