According to Belgian authorities, six people have been detained as part of the investigation into Tuesday’s suicide bombings in Brussels. Three of them were detained in front of the federal prosecutor’s office, which said the arrests came during police searches in the neighborhoods of Schaerbeek and Jette, as well as in the city centre. This comes after the authorities lowered the security alert level down a notch from four – the highest level – to three, and as the search continues for at least one Brussels attacker now on the run. Police are looking for the man captured by a security camera at Brussels airport along with two suicide bombers. The man who was wearing a hat and a cream jacket has not been named. There are reports that a suspected second bomber in the attack on the metro is also being sought. The self-proclaimed Islamic State group claimed responsibility for the attacks which killed at least 31 people and wounded 270. Turkey’s accusations that it had deported one of the suicide bombers and had warned Belgium about him prompted two Belgian ministers to offer to resign on Thursday.