A man accused of threatening rail passengers with an 11-inch blade while shouting 'Allahu Akbar' has been arrested in Belgium.

The suspect, aged in his 40s, was apprehended by police at Brussels-South station after he allegedly began ranting on a train.

As well as 'Allahu Akbar' (Arabic for 'God is Great) the man is said to have shouted: 'We're going to kill all of you'.

A knifeman accused of threatening rail passengers with an 11-inch blade while shouting 'Allahu Akbar' was arrested at Brussels-South station (stock image)

He is also claimed to have screamed that he wanted to 'finish the work started by the Nazis', according to RTL.

Police were waiting for the suspect on the platform as the train arrived at Brussels-South after which they allegedly found him in possession of a knife.

Nobody is believed to have been hurt during the incident, which took place on Monday, but the man is now being held in custody on suspicion of being linked to a terrorist organisation.

Today authorities extended his detention by one month as the case is being investigated.

Belgium has been affected by the rise of terrorism recently and in August, a knifeman was shot dead in Brussels after attacking a group of soldiers, injuring two.

And in March 2016 35 people were killed and more than 300 were injured in the Belgian capital when suicide bombers attacked the airport and Maalbeek metro station.