Najim Laachraoui was apparently seen alongside the suspected suicide bombers at Brussels airport. Laachraoui is believed to be the only suspect remaining on the run following Tuesday's attacks, where brothers Khalid and Brahim el-Bakraoui died carrying out bombings at Brussels airport and Maalbeek Metro station. Local authorities have not yet officially confirmed the information.
Laachraoui, who was born May 18, 1991, is a native of Schaerbeek, a municipality located in the Brussels-Capital Region of Belgium.
The police have been actively looking for Laachraoui in connection with the Paris attacks, after his DNA was found on some of the explosive material used in the November attacks in Paris.
Earlier on Wednesday, Belgian Interior Minister Jan Jambon said that Tuesday's attacks in Brussels were unlikely linked to the recent arrest of Salah Abdeslam, suspected of involvement in the Paris attacks.
At least 34 people died and 260 have been injured in multiple terrorist attacks across Brussels.