BBC - Many people have been killed or seriously injured in terrorist attacks at Brussels international airport and a city metro station, Belgium's PM says. Two blasts hit Zaventem airport at about 07:00 GMT, and another struck Maelbeek metro station an hour later. The government has not confirmed casualty numbers. Brussels transport officials say 15 died at Maelbeek and media report 11 dead at the airport. Belgium has now raised its terror threat to its highest level. The attacks come four days after Salah Abdeslam, the main fugitive in the Paris attacks, was seized in Brussels. Prime Minister Charles Michel called the latest attacks "blind, violent and cowardly", adding: "This is a day of tragedy, a black day... I would like to call on everyone to show calmness and solidarity".