Najim Laachraoui, 24, is thought to have made bombs in Brussels attack
    He has also used the alias Soufiane Kayal fake documents to rent flat
    His DNA was found in safe house used to plan the Paris attacks
    Stopped by Austria-Hungary border guards in a rented car on September 9
    Belgian Prosecutor hunting Laachraoui after he travelled to Syria in 2013 

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Belgian authorities are raiding the neighborhood of the bomb maker thought to be behind November's Paris attacks as experts say he may have designed the explosives that killed at least 31 people today in Brussels.
Najim Laachraoui, 24, is also suspected of being responsible for the bombs used in the Paris massacre after it was revealed his DNA was found on suicide belts used in the Bataclan Theatre and the Stade de France. 
Laachraoui reportedly travelled to Syria in February 2013 and was stopped by guards at the Austria-Hungary border on September 9 last year while driving a rented Mercedes he shared with Salah Abdesalam, according to the Belgian Federal Prosecutor.





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Shocking images from Maelbeek station show the mangled remains of the train, smoke pouring out of the building and casualties littered on the pavement outside. Witnesses heard a loud bang at 9.19am - just over an hour after two explosions killed at least 14 and seriously injured 50 in a suicide attack on the Belgian capital's main airport. Commuters on the Brussels Metro network were evacuated into smoke-filled tunnels and along the tracks to safe stations in scenes reminiscent of the 7/7 attacks in London. The image above is being used by the Belgian media who claim this is the damage caused by the bomb at the Maelbeek Metro station in central Brussels this morning.





The pair were also travelling with Mohamed Belkaid, 35, the man shot and killed during the raid to capture Abdelslam on Friday.
It is thought Laachraoui was not stopped as he was using a drivers licence under a different name and traveled to Budapest twice in September 2015. 
On this instance, the three men had posed as tourists heading to Vienna on holiday and did not raise suspicions when they were stopped by police.
Laachraoui was also captured on CCTV with Belkaid four days after the attacks during a money transfer in a Western Union bank in the Brussels area.
'The investigation showed that Soufiane Kayal can be identified as Najim Laachraoui, born on May 18, 1991 and who travelled to Syria in February 2013,' prosecutors said in a statement in Brussels. 
It is also using this alias that authorities have said he was in contact via phone with Paris attacks ringleader Abdelhamid Abaaoud, and gave him guidance in the lead-up to the November attacks. 
He has been identified as using the alias Soufiane Kayal - the name he used to rent the safe house used by the Paris bombers to plan the Paris attack, where his DNA has also been found as well as in their hideout in Schaerbeek.


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Photo: AFP/Getty ImagesFirst picture: These three men, pretending to be air passengers, are believed to the terrorists who have carried out the Brussels airport. The two suspected suicide bombers on the left were both wearing black gloves - which the Belgian media says would have hidden the triggers for their explosive vests. The third suspect in the hat is believed to still be on the run after dropping his nail bomb




At the house on Rue Henri Berge, investigators found traces of TATP - a signature explosive of ISIS in Europe, and was found in the suicide vests used by the Paris attackers.  
It comes as Belgian federal prosecutors say a house search in the Brussels neighborhood of Schaerbeek has 'led to the discovery of an explosive device containing among other things nails.'
Investigators also found chemical products and an Islamic State flag.  
A Belgian prosecutor says police raids are happening around the country after two men 'probably' staged suicide bombings at the Brussels airport and a third fled.
Prosecutor Frederic Van Leeuw said Tuesday that the third suspect  - on the right of the photo wearing a thick white sweater - is actively being sought by police.
The 'masterbomber' Najim is believed to have studied electro-mechanical engineering at a Catholic high school named as the Institute de la Sainte-Famille d'Helmet by in an investigation by The New York Times.
Authorities say it's not possible at this stage to establish any links between the attacks Tuesday in Brussels and those in Paris on November 13 that left 130 people dead. 



Mr Pantucci, the Director of International Security Studies at the Royal United Services Institute, said information surrounding the 'mystery bomb maker' Najim Laachraoui is still very sketchy.
He said: 'We don't know much about him at this point. This individual is being identified as a bomb maker but we have concerns whether that is 100 per cent true or if he's one of a number of bomb makers.
'This terrorist group in Brussels had multiple, viable explosive devices. It suggests they were dealing with someone with substantial experience.
'That could be the same person responsible for the bomb devices in the Paris attacks but it could be someone else, part of a larger cell.
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Photo: AFP/Getty Images
Wanted: Police have issued an appeal to catch this ISIS suspect, seen on CCTV footage dressed in a white shirt and jacket and wearing a dark hat as he pushed a luggage trolley through the airport minutes before two bombs rocked Brussels Airport 


'Given the location and the nature and the use of explosives and guns the thought process goes down the page of assuming it's linked to the organised network around Abdeslam.
'We can't be sure but it would be surprising if it wasn't the same group.'
Foreign Minister Didier Reynders said on Sunday that Salah Abdeslam, who was arrested on Friday when was caught was 500 metres from his childhood home, had claimed that 'he was ready to restart something from Brussels, and it's maybe the reality,'
Reynders gave credence to the suspect's claim because 'we found a lot of weapons, heavy weapons in the first investigations, and we have seen a new network of people around him in Brussels.'




The moment of capture as Abdeslam is snared by armed officers following a tense siege in the Molenbeek neighbourhood of Brussels
The moment of capture as Abdeslam is snared by armed officers following a tense siege in the Molenbeek neighbourhood of Brussels



Salah Abdeslam (left), one of the most wanted men in Europe, has been wounded and caught by police (right, an officer at the scene of the raid