Western Europe was on high alert on Tuesday after attackers launched twin assaults in Belgium's capital Brussels with bombs ripping through the airport and the underground metro line.
More than 30 people were killed and hundreds wounded - many in critical condition.
Belgian's federal prosecutor told state media one of the explosions at Zaventem airport was "probably" a suicide attack.
Police were going door-to-door throughout Brussels searching for suspects or others planning attacks. The interior minister said 600 additional police were deployed. There was no immediate claim of responsibility.
The explosions struck the heart of European officialdom where NATO headquarters is based, along with the European Parliament and European Commission.
Footage from the airport - the country's largest - showed people running from the terminal building as plumes of smoke rose to the sky. Fourteen people were killed and more than 90 wounded with the casualty toll steadily rising on Tuesday.
;Source: Al Jazeera...More...