Brussels Zaventem airport blasts cause casualties The Belgian government has confirmed casualties but has given no numbers. The cause of the explosions is unknown. Another explosion has now been reported at the Maelbeek metro station close to the EU institutions. The whole metro system has been closed. The blasts come four days after the capture in Brussels of Salah Abdeslam, the main suspect in the jihadist attacks in Paris on 13 November 2015. Belgium has now raised its terror threat to its highest level.