Multiple explosions went off in Brussels on Tuesday, with two at the main international airport and another at a downtown metro station, killing at least 30 people.
An Islamic State-linked news agency said the extremist group claimed responsibility for the attacks.
Here's some of the coverage streaming out around the world after another devastating day in Europe:
Raw footage of the aftermath at Brussels' airport, featured on NBCnews.com.
Timeline of the Brussels attacks
Police issue wanted notice for suspect after Brussels attacks
Since Paris, there have been hundreds of terrorist attacks
Cartoonists from around the world respond to the Brussels attack
Global financial markets are getting used to terrorism
US feared Brussels attack but lacked hard intelligence: officials
Brussels attacks raise questions about global airport security
Italy wants common European defence after Brussels attacks
Ukraine and Russia get into ugly spat over Brussels attacks
Timeline of Islamist attacks in Belgium
Deadly Islamist attacks in Europe since 2004
Obama condemns 'outrageous' Brussels attacks
Belgians turn to Twitter to offer rooms, rides after Brussels attacks
Police control the access to Brussels' central train station after bomb attacks, March 22.
'Sad day for Europe,' tearful EU foreign policy chief says
Stocks rebound, safe-haven assets ease after Brussels attacks
UK tightens security as PM urges joint stand on terror
Travel, airline stocks down as US stocks fall
Pope slams 'blind violence' in Brussels, prays for victims
Attacks in Belgium trigger row in Britain over EU membership
British prime minister: "We will never let these terrorists win"
French president: "The whole of Europe has been hit"
S. Korea condemns Brussels attacks
New York steps up security after Brussels attacks
Delta, United reroute flights from Brussels after blasts
Denmark, Sweden, Finland increase airport security after Belgium explosions
Travel chaos as Europe freezes air, rail links with Brussels
Brussels airport dead hit in legs: witness
Blood and panic as Brussels comes under attack
Inside Molenbeek, the troubled Brussels neighborhood linked to terror in Paris
Trump calls for tough US border security after Brussels attacks