POLICE were hunting a suspect in the Brussels bombings yesterday as Belgian politicians urged a crackdown on civil liberties in response to the atrocities.

Tuesday’s bomb attacks at Zaventem airport and Maelbeek metro station killed 34 people and injured some 200.

Belgian Federal Prosecutor Frederic Van Leeuw identified two of the attackers as brothers Ibrahim El Bakraoui, one of two suicide bombers at the airport, and Khalid El Bakraoui, who blew himself up the station.

The second airport bomber, who fled after his explosives failed to detonate, had not yet been identified.

A third, who has not been named officially but has been identified in reports as Najim Laachraoui, is on the run.

Investigators raided the Schaerbeek district after the attacks and found a computer in a bin in the street including a note from Ibrahim El Bakraoui.

The prosecutor said he had indicated in the note that he was “on the run” and did not “know what to do.”

Mr Van Leeuw said two people were arrested on Tuesday night. One is being questioned and the other has been released.

Four British citizens were confirmed injured in the explosion, but one has been discharged from hospital.

The family of Briton David Dixon, a Brussels resident from Hartlepool who has been missing since the bombings, were reported to be “desperately” searching for him.

French Prime Minister Manuel Valls urged the European Parliament to rush through legislation for the Europe-wide Passenger Name Record scheme.

German Interior Minister Thomas de Maiziere called for European police and security agencies to share suspects’ data, arguing that the situation “should make us put the data protection arguments last.”

In the US, civil rights groups hit back at Republican presidential hopeful Ted Cruz after he said police should “patrol and secure Muslim neighbourhoods before they become radicalised” in the wake of the attacks.

The Council on American-Islamic Relations said the comments sent “an alarming message to American-Muslims who increasingly fear for their future in this nation.”

The Anti-Defamation League, which fights anti-semitism, said his plan harkened back to the jailing of Japanese-Americans in internment camps during World War II.

nThe Belgian Islamic State field commander known as Salahiddeen Al-Beljiki was reportedly killed by Syrian troops on Monday as his unit attacked the besieged eastern city of Deir Ezzor.