WARSAW: A freight train smashed into the back of a nearly empty passenger train at a station in southwestern Poland early on Sunday, injuring two people, officials and media said.

The accident occurred at 4:45 am (0245 GMT) at the train station at Ostrow Wielkopolski.

"Two injured passengers were hospitalised as were the two train conductors for observation," said a spokesman for the PKP national railway company. He did not provide a reason for the crash.

The passenger train was to head to Wroclaw, one of the Polish venues for the Euro Football championship that starts on June 8 and that Poland is co-hosting with neighbouring Ukraine. It was nearly empty at the time of the accident, said the PAP news agency.

On Wednesday, two people were lightly injured when two suburban trains collided head on not far from the national stadium in Warsaw.

In early March a head-on train collision 200 kilometres (124 miles) south of Warsaw killed 16 people and wounded some 60 others.