Train attack suspect is a German national, police confirm

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One dead and three injured in knife attack at German train station

One person has been killed and three injured in a knife attack at a train station near Munich.

Witnesses said that the suspected attacker shouted "Allahu Akbar" - Arabic for "God is great" - during the stabbings, but police say there is no evidence he was part of an Islamic extremist network.

The man was arrested shortly after the attack in Grafing at around 4:50am local time. Officials have said that the 27-year-old, named locally as Paul H., has "mental health and drug problems," according to AFP.

The man being held over the fatal knife attack at a railway station near Munich this morning is a 27-year-old German man, police have confirmed to NBC News.

One man died and three more are seriously injured in hospital after the attacker began stabbing people "indiscriminately" at the suburban station at 4:50am.

The man is said to have shouted shouted "Allahu Akbar" - Arabic for "God is great" - during the stabbings.

Bayerische Rundfunk reported that the attacker was not known to German police.