A group of men impersonating ISIS fighters have caused terror and anger after wielding fake guns while shouting 'Allahu akbar' in the centre of Prague.

The fake jihadis rode into Old Town Square in the Czech capital on Sunday in a Humvee vehicle, alongside a camel.

Terrified tourists, including children, ran for safety as the men let off fake gunfire and riled up crowds.

Around 40 fake jihadis rode into Old Town Square in the Czech capital on Sunday wielding imitation machine guns

'I was entering Old Town Square from a far corner and heard gunshots,' Prague resident Andrea Steinova told the New York Times.

'Then I saw a group of about 40 people, some of them yelling in Hebrew, running toward me. A couple of them tripped and fell, and others ran over them.'

The sick act was an anti-immigration protest called 'The Occupation of Prague', which City Hall and police were reportedly aware of.

The leader of the protest, Martin Konvicka, was dressed as an imam spouting ISIS propaganda

A man in a large fake beard and suicide bomber vest waved a black ISIS flag on board the vehicle

The group had reportedly informed City Hall about the planned protest and were not stopped from carrying it out until protesters began to clash on Sunday

Anti-Islam activist Konvicka organised THE performance showing the invasion of ISIS in Prague

Konvicka (pictured in white) pretended to preach to the crowds as he stood on the Humvee

The activists donned fake beards, suicide bomber vests and even had a 'hostage' in an orange jumpsuit on board their Humvee.

The leader of the group called 'We don’t want Islam in the Czech Republic', Martin Konvicka, was dressed as an imam as he told the crowd: 'We are bringing you the light of true faith'.

At one point his mock beard fell off while he was speaking.

'Xenophobe, xenophobe,' a woman in a red top in the crowd shouted back at him.

Police officers eventually came over and stopped the sick demonstration which was staged at a time of heightened fear of terrorism across Europe.

The sick act was carried out by a group called 'We don’t want Islam in the Czech Republic'

Some tourists stopped to film the bizarre spectacle as men in fake orange beards held up mock machine guns