A new terror attack plot has been thwarted in Germany after mass police raids resulted in the arrest of a prolific Tunisian Isis recruiter.

Police stormed 54 homes, mosques and businesses in the state of Hesse in the early hours of the morning in an operation targeting extremists planning “serious state-threatening violence”.

“According to evidence gathered so far, attack plans were still in an early phase and had not selected a specific target,” said a spokesperson for the Hesse state criminal investigation office.

Officials said the main suspect arrested was a 26-year-old Tunisian man who has been wanted since August 2015 as a recruiter and people smuggler for Isis.

Muslim men and women stand outside the Bilal mosque in Griesheim district of Frankfurt during a police raid on 1 February (Getty) (Getty Images)

The unnamed suspect has allegedly established a network of supporters “with the aim, among other things, of committing a terrorist attack in Germany”.

He was present in Germany from 2003 to 2013, then returned during the refugee crisis of 2015 posing as an asylum seeker.

He was arrested shortly afterwards over a previous conviction for bodily harm in 2008, for which he needed to serve 43 days in prison, and Tunisian authorities had also requested his extradition.

They suspect the jihadi of involvement in the attack on the Bardo Museum in Tunisia in March 2015, which left 20 tourists dead, and an assault by Isis insurgents on the border town of Ben Guerdane last year.

German authorities said the man was freed from prison in September, and because Tunisia had not submitted the required extradition documents, he had to be released from temporary custody in November after the maximum period allowed under German law.

Paperwork delays also prevented the deportation of the Isis supporter who carried out the Berlin Christmas market attack, with the revelation sparking anger at German and Tunisian authorities as Angela Merkel pledged reforms.

Berlin Christmas market lorry attack Show all 18 1 /18 Berlin Christmas market lorry attack Berlin Christmas market lorry attack Several people have been killed after a lorry drove into crowds at a Christmas market in Berlin REUTERS/Fabrizio Bensch Berlin Christmas market lorry attack 'At least nine' people have been killed and more than 50 injured. AP Berlin Christmas market lorry attack Emergency Services rush a Berlin market victim to an ambulance Associated Press Berlin Christmas market lorry attack Police cordoned off the square at Kaiser Wilhelm Memorial Church following the incident REUTERS Berlin Christmas market lorry attack Rescue workers inspect the lorry that crashed into a Christmas market close to the Kaiser Wilhelm memorial church in Berlin EPA Berlin Christmas market lorry attack Emergency crews inspect the lorry that ploughed into a Berlin Christmas market, killing at least nine people AFP Berlin Christmas market lorry attack Fire crews attend the scene of the attack AFP/Getty Berlin Christmas market lorry attack Armed police secure the site of a lorry attack at a Christmas market in Berlin REUTERS Berlin Christmas market lorry attack Crushed debris is visible beneath the wheels of the vehicle REUTERS Berlin Christmas market lorry attack An injured man is pushed to an ambulance REUTERS Berlin Christmas market lorry attack Medics attend an injured person after the lorry attack which killed at least nine and injured more than 50 people AFP/Getty Berlin Christmas market lorry attack Firefighters examine the lorry which was rammed into a Berlin Christmas market REUTERS Berlin Christmas market lorry attack A person is carried into an ambulance REUTERS Berlin Christmas market lorry attack View of the lorry that crashed into a Christmas market in Berlin, killing at least nine and injuring at least 50 people AFP/Getty Berlin Christmas market lorry attack Rescue workers push a person on a stretcher to an ambulance Getty Berlin Christmas market lorry attack Firefighters assess the damage after the lorry rammed the Christmas market, killing 'at least nine', and injuring more than 50 people AP Berlin Christmas market lorry attack Firefighters stand beside a toppled Christmas tree at the site of the suspected terrorist attack in a Berlin Christmas market AP Berlin Christmas market lorry attack Damaged stalls at the scene of the incident at a Berlin Christmas market where at least nine people have been killed EPA

“From immediately after his release until his arrest on 1 February, the main suspect was watched around the clock,” a spokesperson for Frankfurt police said.

The man did not resist his arrest, which was delayed to avoid jeopardising the ongoing investigation into a wider terror network, he added.

He is one of 16 suspected Isis supporters aged between 16 and 46 targeted in the four-month investigation.

In a separate case, prosecutors in Berlin said that they arrested three people on Tuesday night who were suspected of planning to travel to Syria or Iraq to undergo explosives and weapons training with Isis.

All three were associated with the Fussilet mosque in Berlin, known as a gathering point for radicals, prosecutors said.