Police have swooped on ISIS-linked terror cells in Belgium and Germany today, arresting at least 10 people said to have been recruiting for ISIS.

Belgian police arrested people in the Brussels area who were allegedly part of a network recruiting people to fight with the terror group in Syria, prosecutors said.

They were caught in raids in several areas of the Belgian capital, including the Molenbeek quarter where several of the key suspects in the November Paris attacks lived.

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Police and army members patrol Brussels in the wake of the Paris attacks last year, where raids today netted 10 people police say were recruiting for ISIS

The federal prosecutor's office said however that the arrests were not linked to the Paris bomb and gun attacks, claimed by ISIS, which left 130 people dead and hundreds injured.

'The raids were carried out as part of an investigation into a recruitment network linked to Islamic State.

'The investigation helped determine that several people had travelled to Syria to join Islamic State.'

The raids were ordered by a counter-terrorism judge in the eastern city of Liege who will decide later in the day whether to continue holding the suspects, the statement said.

Investigators were studying mobile phones and computer equipment seized in a total of nine raids across Brussels.

Today German police raided several homes linked to an Islamic extremist group in the northern city of Bremen.

The dpa news agency reported that the raids early today followed a decision by the city-state's top security official banning the group Islamischer Foerderverein Bremen.

It is considered the successor to a previously banned extremist organisation whose members had fought for ISIS in Syria.

Authorities planned to hold a news conference about the raids later today.

The mastermind of the Paris terror attacks, Abdelhamid Abaaoud (pictured), was a Belgium-born Morrocan

Belgium has produced more jihadist fighters relative to its population than any other country in Europe, with some 500 believed to have gone to fight in the Middle East.

Belgian police are holding nine people in connection with the November 13 attacks in Paris as it emerges that the onslaught was largely organised and coordinated from Belgium.

Three others were released but remain charged in connection with the attacks.

Thirty-one people went on trial yesterday in Brussels - half of them in absentia - on charges they belonged to a 'terrorist group' that recruited for ISIS and other groups in Syria between 2012 and 2014.

One of those present, Khalid Zerkani, was sentenced last July to 12 years in jail for encouraging people to go to Syria in connection with another network.