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Failed asylum seeker Amri had been under surveillance by police "for several months" in Germany earlier this year but police missed several opportunities to deport him. According to Associated Press he should have been removed from Germany but a "problem with his paperwork" meant he was allowed to stay. Yesterday, officers stormed a migrant shelter during the search for the Tunisian asylum seeker, who has links to radical Islamism and who is suspected of carrying out the horrific massacre. Earlier on Wednesday, detectives searching for Amri found identification documents under the driver's seat of the truck that ploughed into crowds at a busy Christmas market, injuring 50 people. Authorities have warned that the suspected attacker is on the run and may be armed. Around 150 police stormed a centre for migrants in the town of Emmerich, near the border with the Netherlands. Germany has issued a European Arrest Warrant for Amri with increased checks at border crossings and a bounty of €100,000 (£84,000) has been offered for any information leading to his arrest.

Barcroft Images Anis A suspected of terrorism in Berlin, is said to have lived in a camp in Emmerich am Rhein

ID papers discovered in the truck revealed the suspect had been given a temporary stay permit by the German authorities. His request for permanent residence as a refugee in Germany had been rejected but he was allowed to stay in the country, according to reports. The papers also show he was born in the southern Tunisian city of Tataouine on December 24, 1992 - making him 24 this week. Reports in German media said he was known to the police for aggravated assault after getting into a knife fight over drugs but was not charged after he disappeared earlier this month before he could appear in court. The Tunisian was arrested three times in Germany and is reported to have done jail time in Italy but was never deported from Europe. He arrived in Germany in July 2015, claiming asylum in April this year before it was rejected in July, and security sources say he has links to Islamic State.

BERLIN TERROR: 'TWELVE' dead as truck crashed into crowd at Christmas market Tue, December 20, 2016 A truck crashed into a Christmas market in Berlin killing at least 12 and injuring 48 Play slideshow REUTERS•AFP 1 of 21 A truck crashed into a Christmas market in Berlin killing at least 12 and injuring 48

Amri is described as "highly dangerous" and a member of a "large" Islamic organisation and had attempted to buy a gun from a police informant in Germany. The 23-year-old, who is believed to have used at least four and up to eight different names and is also known as Ahmed A, is linked to addresses in Berlin and North Rhine-Westphalia (NRW) state. Raids on two apartments in Kreuzberg on Wednesday but Anis A was not found. Interior minister Thomas de Maizière stressed Amri "is a suspect, not necessarily the culprit”. A spokesperson for Tunisia's foreign ministry said it was trying to verify the information. A police operation is now under way in NRW, where his ID card was issued, which suggests detectives may have more information about exactly where the suspect was based. The brother of terror suspect Anis Amri said he had been sleeping “here and there” in Germany but he said he had not spoken with his sibling, Europe's most wanted man, for a fortnight.

GETTY•PH Police raided a migrant shelter in Emmerich

Walid Anis a trucker in the Tunisian town of Kairouan said his brother had always wanted to go to live in Merkel’s country. The 30-year-old said: "We have only had contact over Facebook - I have no mobile number for him. "He told me often that he couldn't find a flat In Germany and was sleeping here and there. But during our last contact two weeks ago he said everything was good with him. "He comes from a family of nine children and always sent money back to us. I don't know where it came from. "We live as a struggling family, we live a totally normal life. "We are as shocked as everyone else in the world. We have no contact to Isis. I only learned my brother was being hunted over Facebook. "I am affected the same as everyone else by this news."

FACEBOOK A photograph of the suspect taken from his Facebook

Failed asylum seekers can remain in Germany even after their application has been rejected under certain circumstances, including if they have lost their passport or cannot arrange transport. So-called 'temporary suspension of deportation' orders can also be applied if the failed applicant becomes unwell and is unable to be deported immediately. In the case of Amri, the German authorities were delayed in deporting him because he lacked the proper documentation. Their Tunisian counterparts said they had no record of him being a citizen, which may have delayed him getting a passport.

FACEBOOK A spokesperson for Tunisia's foreign ministry said it was trying to verify the information

The development will pile further pressure on German Chancellor Angela Merkel and her immigration policy which allowed more than 900,000 migrants to enter the country last year. Protestors took to the streets of Germany on Wednesday evening as residents vented fury over Merkel’s migrant policy. Furious groups gathered by the Kaiser Wilhelm Memorial Church, two days after the attack at the nearby Christmas market, for an anti-migrant rally. Supporters of the right-wing AfD party surrounded Merkel's office in Berlin protesting against the chancellor's ruling party and migration policy. The investigation appeared to go cold overnight after the authorities released the first suspect who was arrested immediately after the attack. Police piecing scant clues together believe the new suspect may have been injured in a fight with the truck's driver.

FACEBOOK Authorities have warned that the attacker is on the run and may be armed

But there is no CCTV of the market and police have struggled to build a clear picture of exactly what happened. Questions will now be asked about why it took detectives more than 24 hours to find the ID card in the footwell of the truck. Another opportunity to deport him was missed in August when he was detained in the south German town of Friedrichshafen carrying Italian ID papers. The reason for the arrest is not yet known. According to security sources, Amri is a disciple of Abu Walaa, who was arrested in Hildesheim last month for recruiting radicals into the ranks of Isis.

GETTY Angela Merkel at a memorial to the dead

He was arrested along with five members of a terrorist recruiting network operating on behalf of ISIS, according to prosecutors. The arrests took place in the states of North Rhine-Westphalia and Lower Saxony. The network recruited and provided logistical support for local volunteers making their way from Germany to Syria. Iraqi citizen known Abu Walaa, 32, or Ahmad Abdelaziz as he is also known, is a leading figure of the Jihadi movement in Germany.

REUTERS Carnage at the market

Monday's Berlin terror attack saw a lorry ram through the Christmas market near the famous Kaiser Wilhelm Memorial Church in Germany's capital.



A Pakistani asylum seeker had been arrested in connection with the attack but was released due to a lack of evidence.



Police later said they had arrested the "wrong" man. On Tuesday night the so-called Islamic State claimed responsibility for the attack.

NC Anis Amir was born in 1992 and is also known by two aliases

NC The Tunisian suspect Anis Amri

GETTY Tataouine is a city located in southern Tunisia