These pictures show the vast interior of Germany's largest migrant centre which was raided by commandos this morning in the hunt for Berlin terror attack suspects.

Pakistani asylum seeker Naved B, 23, has been arrested over last night's atrocity, which saw a lorry plough into a Christmas market in Breitscheidplatz Square - killing 12 people and injuring 48.

However, there have since been reports that police may have arrested the wrong man and that the real suspect could still be on the loose

'Naved B', who denies involvement, was believed to be living at Germany's largest refugee camp at Tempelhof. The former airport was raided by an elite group of armed anti-terror police at 4am this morning.

The hangar closed down several years ago but the buildings at the airport, which was developed by the Nazis, sprawl over a vast area and parts of it were turned over to house refugees in the capital.

A unit of the elite SEK armed police this morning stormed a hangar at the old Tempelhof Airport in the middle of Berlin in connection with the terror truck attack.

The hangars are all furnished with bunk beds and accommodate refugees and asylum applicants from all over the world. It opened in March

The airport hangar closed down several years ago but the buildings sprawl over a vast area and parts of it were turned over to house refugees in the capital

Returning Jihadist fighters to Germany have told intelligence operatives that ISIS regards the country as a prime target for terror and has been striving all this year for a 'spectacular' outrage to match those carried out in France.

Officials currently classify around 500 Islamists in Germany as high risk and 250 of them are monitored around the clock. But lone wolves are hard to spot and, when not part of an organised network leaving electronic footprints, almost impossible to apprehend before the event.

A unit of the elite SEK armed police this morning stormed a hangar at the old Tempelhof Airport in the middle of Berlin in connection with the terror truck attack.

Reports suggest up to 250 officers took part in the operation. Four men in their late 20s were questioned by police but nobody was arrested.

The former airport, built in 1923, is home to some 13,000 refugees who are waiting to be accommodated elsewhere.

Pictures from inside the facility show rows of temporary rooms each capable of accommodating up to 12 migrants.

German officials had earlier said that the driver of the terror lorry was a Pakistani national who entered Germany via the Balkans between December 31 and February as an asylum seeker.

Whether or not the 4am raid at Tempelhof was a hunt for evidence or for possible accomplices was not immediately clear.

Returning Jihadist fighters to Germany have told intelligence operatives that ISIS regards the country as a prime target for terror and has been striving all this year for a 'spectacular' outrage to match those carried out in France

A unit of the elite SEK armed police this morning stormed a hangar at the old Tempelhof Airport in the middle of Berlin in connection with the terror truck attack

The Pakistani driver entered Germany via the so-called Balkan route on New Year's Eve last year and registered in Berlin with authorities in February this year.

He came into Germany at the border crossing in Passau in Bavaria.

But police now believe they may have the wrong man and the real suspect could still be on the loose.

German interior minister Thomas de Maiziere said the man has denied any involvement, and Berlin's police chief Klaus Kandt has said officials are unsure whether they have detained the real suspect.

According to German newspaper Die Welt, a police spokesman said: 'We have got the wrong man, which means a new situation, because the actual attacker is still armed and free and can cause more damage.'

The old terminal has been transformed to create Germany's biggest refugee centre

Accommodation: Thousands of refugees live in four hangars at the old Tempelhof Airport

The airport closed down several years ago but the buildings sprawl over a vast area and parts of it were turned over to house refugees in the capital

A suspect arrested over the attack, who denies involvement, was believed to be living in a refugee camp at Tempelhof (pictured)

Mr Kandt told reporters that police 'haven't been able to confirm' whether the man held was the lorry's driver.

A service is to be held at midday for victims of the tragedy in Berlin's St. Hedwig's Cathedral conducted by Archbishop Heiner Koch.

The Berlin lorry suspect was transported overnight to Karlsruhe, the home of Germany's top federal prosecutor who has taken over the investigation.

No-one was arrested in the SEK search of the Tempelhof asylum home although a number of Afghani refugees were quizzed.

The abandoned terminal was once described by architect Sir Norman Foster as the 'mother of all airports'.

The abandoned terminal was once described by architect Sir Norman Foster as the 'mother of all airports'

Spanning over 300,000 square metres, the airport has a 1.23km roof which covers the airport's main hangers

The airport is best known for the its vital role in the Berlin blockade, where an estimate 4,500 tons supplies were airlifted into West Germany following the Soviet Union's decision to prevent access

It was closed as a working airport against the wishes of Berliners nearly a decade ago.

Spanning over 300,000 square metres, the airport has a 1.23km roof which covers the airport's main hangers.

Tempelhof airport was where Adolf Hitler delivered his famous May Day speech whilst holding the role of Chancellor.

The airport was rarely used by the Luftwaffe during the war and was largely kept closed except for ceremonial occasions.

The airport is best known for the its vital role in the Berlin blockade, where an estimate 4,500 tons supplies were airlifted into West Germany following the Soviet Union's decision to prevent access.

In May, Vice visited the centre and spoke to some of the refugees living there.

Tempelhof airport was where Adolf Hitler delivered his famous May Day speech whilst holding the role of Chancellor

Hundreds of uniformed German soldiers listen attentively at the Tempelhof airfield as Adolf Hitler delivers his May Day speech in May 1934

Head of Nazi district Julius Streicher during a speech in front of reporters at the airport Tempelhof. He was the founder and publisher of Der Stürmer newspaper, an important part of the Nazi's propaganda

Sayed, 37 from Mazar-i-Sharif in Afghanistan said he had been there for more than four months.

'I have no idea what will happen next, or how long I'll be living here. Living here isn't good – especially for my mental state.

'This morning we had a big problem with some of the security guys. We're having issues with integrating too – there has been no news about an integration course we were supposed to have. I'm living with two other families in my cubicle, 12 people in total. I have to like them, I have no choice.'

Another two men, Hamza, 28 and Akram, 16 from Qunaitra, Syria, complained of being 'treated as refugees, not as human beings'.

A 37-year-old mother called Nadia,from Logar Province, Afghanistan, said her son 'never wants to go out and play'.

Across Germany there are 2,500 Christmas markets currently operating. The police presence at many of them in big cities has been considerably increased.

At 11am Chancellor Merkel spoke about the carnage, saying; 'An entire country is united with the victims and their survivors in deep mourning'

ISIS in recent weeks had made renewed calls for disciples to carry out atrocities in Europe and German intelligence warned Berlin authorities recently that the city's bustling markets - tourist magnets for foreigners - were vulnerable to attack

Carnage: Pictures this morning show the broken wind shield of a truck that crashed into the Christmas market

At 11am Chancellor Merkel spoke about the carnage, saying; 'An entire country is united with the victims and their survivors in deep mourning. We all hope and many of us pray for them. That they can find comfort and support. That they can survive after this terrible attack.

'I know that it is particularly hard to bear for all of us, that a person has committed this act who has asked for protection and asylum in Germany.

'Millions of people have been asking: How can we live with it that at a Christmas market - a place of joy – a killer brings death to so many people? I have no simple answer to this question.