Brussels attack fugitive named as 'chief Isis bomb maker' Najim Laachraoui

Laachraoui has been previously connected to Paris attacks prime suspect Salah Abdeslam

Airport CCTV shows the three suspects; Faycal Cheffou is on the right (Belgian Federal Police )

The Brussels airport attacker still at large has been identified as Najim Laachraoui, a man already sought by the police since Monday, Belgian newspaper La Derniere Heure said.

The 25-year-old’s DNA has been found in houses used by the Paris attackers last year, prosecutors said on Monday, and he had travelled to Hungary in September with Paris attacks prime suspect Salah Abdeslam.

Last week, Belgian police said they were hunting for the suspected accomplice of Abdeslam. He is believed to have made the suicide vests used in the November attacks in Paris, in which 130 people were killed at the Bataclan theatre, Stade de France and at restaurants and cafes around the French capital.

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His DNA was reported found on the explosives used in the attacks.

Belgium has entered its second day of mourning over the terror attacks that shook Europe, killing at least 31 people and injuring at least 198 - including two Britons.

The development came as Belgium’s state broadcaster RTBF has named Khalid and Ibrahim el-Bakraoui as the two men who detonated suitcase bombs, killing themselves and several others, at Zaventem airport.

An alert was put out for the pair following a police raid in the Brussels suburb of Forest last week where two men escaped as an Isis militant battled with officers before being shot dead.

Belgian's federal prosecutor named the el-Bakraoui brothers as the hunt continued after police lost them in a chase over rooftops. A Kalashnikov, book about Salafism and Isis flag was found in the flat alongside a large quantity of ammunition.

Additional reporting by agencies