Multiple people have been critically injured after they were stabbed by a man with an axe on a train in Germany, police have said.

Between 10 and 15 people were wounded in the attack in Würzburg-Heidingsfeld, Bavaria on Monday evening, officers confirmed.

The attacker was shot and killed by police, according to NBC News.

However a German police spokesperson said they are unable to confirm the reports, and that the operation is still ongoing.