Authorities overlooked vital warnings after Ibrahim el-Bakraoui was deported by Turkey

As suspects remain at large, the country seeks to manage its complex politics

Belgium a central worry as groups such as Islamic State seek nuclear materials

Netherlands police were told Ibrahim and Khaled El Bakraoui sought by the Belgian authorities

The Belgian capital, one of Europe’s most Islamic cities, faces up to domestic threat

Police close in on Paris-Brussels terror cell as DNA confirms link between attacks

Two Americans and three Dutch identified as Brussels bombings victims

Death toll may rise above 31 with over 60 people still critical after metro, airport blasts

Turkey claims Belgium ignored warning as police continue to search for suspect

Brussels security issues and police department co-operation spark public anxiety

Brahim El Bakraoui struck at airport and Khalid El Bakraoui detonated a bomb on the metro

Small size and fragmented governance make Belgium ideal for arms-smuggling

Lara Marlowe: Surviving perpetrator of Paris attacks had a reputation as a bon vivant

Swiss banks vows to defend itself against unfounded allegations

As tensions flare, migration commissioner warns system could completely break down

Germany got tip before midnight that Iraq and Syria militants were planning attacks

More than 1,000 security personnel and soldiers have been deployed in the city

Raft of new security measures to be introduced following terrorist attacks

Six police raids in Brussels as French PM warns terrorists could use chemical weapons

New legislation will restrict availability of weapons and criminalise ‘foreign fighters’