Fog is being suggested as the likely cause of a deadly road accident in Poland which has claimed the lives of 17 people.
A small van overcrowded with seasonal agricultural workers collided with a lorry about 80 kilometres south of the capital Warsaw after it veered into the path of the oncoming lorry.
16 people died at the scene, and one of two seriously-injured victims died on the way to hospital. The Polish Interior Minister has gone to inspect the crash site.
Officials say despite the poor visibility it is still too early to be sure about the cause of the crash.