According to Belgian media, three explosions in Brussels on Tuesday killed at least 34 people and wounded about 170 more.
After the blasts, Belgian authorities searched for those tied to the attacks. While there's been no official claim of responsibility, many prominent ISIS supporters celebrated the deadly terror attacks in Brussels on social media. One widely circulated Twitter post among these ISIS backers featured the words, "What will be coming is worse."
Just a few days ago, authorities in Belgium captured Europe's most wanted man, Salah Abdeslam—the latest of many suspected terrorists caught in the small European country. And a U.S. counterterrorism official said, "The Belgians have been sitting on a ticking time bomb," given all those who have gone to Syria and Iraq to join ISIS, then possibly come back home.
Belgian authorities have increased security after the attacks, including shutting down all Brussels metro stations and evacuating the city's airport.
Authorities in New York, Washington, Chicago and Los Angeles have taken special precautions as well. Similar, if not more intense measures were enacted around Europe. NATO, the military alliance that is headquartered in Brussels, increased its own alert level and expressed solidarity with Belgium.