Belgium's police forces are looking for several terror suspects, as the capital, Brussels, endures a second day of a security lockdown.
Interior Minister Jan Jambon said the current threat was greater than that posed by Salah Abdeslam, wanted for the Paris attacks.
Brussels is on its highest level of alert amid fears an attack.
The city was a base for the Paris attackers - Islamic State militants - who killed 130 people.
The security situation in Brussels is being reviewed and an announcement about whether the lockdown should continue is expected at 1700 local (1600 GMT).
Metro services remain suspended, and residents have been told to avoid crowds.
Soldiers are patrolling the streets as a manhunt continued for Salah Abdeslam, 26, a French national who lived in Brussels. Police describe him as armed and dangerous.
Friends said he was in the Brussels area and trying to get to Syria.
Interior Minister Jambon said the "terror threat in Belgium would not be over once Salah Abdeslam is out of harm's way".
"The threat is broader than the one suspected terrorist," he told Flemish broadcaster VRT.
