GETTY German police have arrested two Algerians they suspect of links to the Islamic State group

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The raids were carried out to prevent "severely violent attacks," according to police. Two of the addresses searched were an asylum seeker's home in Hanover and another in Attendorn in the Sauerland region. Experts predict Germany is the target of an ISIS terrorist attack because of its public support for bombing missions against the sick terror group in Iraq and Syria. But Berlin was the centre of the operation where police swooped on four apartments and two business premises. Police spokesman Stefan Redlich said four Algerians were being sought for their suspected links with ISIS terrorists in Syria.

EPA Computers, records and mobile phones were seized during the raids

We still have every reason to be vigilant and careful Berlin's interior senator Frank Henkel

Three others, a woman and two men for whom there were existing arrest warrants, were taken into custody. One of the suspected Islamists is wanted for belonging to ISIS by the Algerian authorities who say he was trained at a terror camp in Syria. During the searches computers, mobile phones and records were seized. Berlin police spokesman Stefan Redlich said the investigation began in December. A total of 450 police officers were deployed in the operation. Apartments in the heavily immigrant areas of Kreuzberg, Tempelhof and Berlin-Mitte were ransacked in the hunt for clues tying the suspects to ISIS Berlin's interior senator Frank Henkel said: "Before we can draw more conclusions, we have to wait for the investigation of the public prosecutor's office and the evaluation of the seized objects. "We still have every reason to be vigilant and careful."

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AFP Plainclothes police stands on the street after a raid in a flat

The raids come as Germany remains on high alert after November's terror attacks in Paris. ISIS claimed responsibility for the atrocities. In the aftermath of the attacks, a football friendly between Germany and Holland at the Tui Arena was cancelled after police received “concrete information” of an attack at the stadium. Hannover’s police chief Volker Kluge said the plan was to “detonate explosives” at the stadium. Two major railway stations in Germany were also evacuated after an intelligence agency warned the country of an imminent attack. Authorities recieved information that suicide bombers could target the central station or Pasing station. Security concerns had already caused New Year celebrations to be cancelled and limited across Europe. Authorities in Brussels called off all official events after three people were detained over an alleged New Year’s Eve plot.

EXPRESS The raids have taken place across Germany

The plot was not thought to be related to the suspected network behind the Paris attacks. Tensions in Germany are at breaking point after hundreds of women were robbed, attacked or sexually assaulted during New Year celebrations outside Cologne cathedral by as many as 1,000 drunk, aggressive men described as of "Arab or North African origin". The scale and nature of the crimes in the city has been a disastrous torpedo to the heart of Chancellor Angela Merkel's open-door refugee policy and her popularity. Having initially been hailed for her leadership over the escalating crisis after offering sanctuary to nearly 1.1million refugees fleeing war and persecution in Syria, the German supremo is now facing growing calls for stricter immigration rules.