Terror threat

Brussels explosions: At least 13 dead after airport, subway blasts (photos, video)

Explosions rocked the Brussels airport and the subway system Tuesday, killing at least 13 people and injuring many others just days after the main suspect in the November Paris attacks was arrested in the city, police said.

Witnesses described the ceiling caving in and blood everywhere after two explosions in the departure hall at the Brussels airport. All flights were canceled, arriving planes and trains were diverted and Belgium's terror alert level was raised to maximum. Authorities told people in Brussels to stay where they were, bringing the city to a standstill. Security was also tightened at all Paris airports.

European security officials have been braced for a major attack for weeks, and warned that Islamic State was actively preparing. The arrest of Salah Abdeslam in Brussels last week heightened those fears, as investigators said many people involved in the Nov. 13 Paris attacks that killed 130 people were still on the loose. After Abdeslam was arrested, Belgian Foreign Minister Didier Reynders said authorities learned he had created a new network around him and had access to several weapons, though there was no immediate indication that he or the Islamic State group had any involvement in Tuesday's attacks.