England's football match against Germany in Berlin will go on as planned.
Sympathizers of the militant group hail the attack as a reaction to Belgium's "war" on religion.
Djordje Djokovic was coming in to land when explosions hit Zaventem airport.
Gatwick, Paris and Frankfurt airports increase security levels after two explosions hit Brussels check-in area.
No links to extremism yet established but ISIS suspects remain at large in Belgian capital.
Shots were fired and Arabic was shouted before the blasts at Zaventem airport, according to reports.
Mohamed Abrini and Najim Laachraoui, both believed to be accomplices of Abdeslam, remain at large.
A bomb disposal unit has also reportedly been training to defend against a chemical or biological attack.
Family, friends and petty criminals helped him evade a manhunt for four months after Paris attacks.
Security services must now prepare to prevent the next attack on European soil, writes RUSI's Raffaello Pantucci.
Salah Abdeslam, the most wanted suspect in the Paris attacks, was wounded in a shootout in the Belgian capital after a monthslong manhunt.
Police have also detained two other suspects linked with the Paris attacks in November.
Salah Abdeslam is suspected of helping to equip the Paris gunmen and suicide bombers.
The Belgian prosecutor has confirmed reports of the find in searches after November 13.
One of the neighborhoods targeted was Molenbeek, which police also raided after the Paris attacks.
The former British leader said the battle against radical Islam is a "global struggle."
Akrouh blew himself up in the St. Denis apartment where attacker ringleader Abdelhamid Abaaoud was holed up.
The new images show Abdeslam with an accomplice at a gas station near the Belgian border.
Prosecutors made the discovery in a December raid in the Schaerbeek district of the Belgian capital.
The tenth suspect linked to the Paris attacks was detained in the neighbourhood of Molenbeek.
Authorities on Wednesday called off the traditional New Year's Eve fireworks display in Brussels.