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.
Three of those arrested are Bulgarian and one is Afghan.
The victims included 59 men, eight women and four children who are thought to have been dead for about two days.
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.
The lorry was towed to a customs building with refrigeration facilities where forensic teams worked through the night to examine the bodies.
The people are thought to have been dead when the vehicle crossed into Austria from Hungary. Among the victims was a girl aged between one and two years old.