Two explosions rocked the departure lounge at Brussels Airport on Tuesday morning and another blast went off in the Brussels Maalbeek metro station. Local media said that up to 13 people had been killed and 35 injured at the airport with another ten dead and an unknown number of others injured on the metro. In the wake of the incidents Belgian authorities raised the terror threat to the country's highest. The airport warned people to stay away in the wake of the explosions, which authorities said was a suicide bomb attack. Zach Mouzoun, who arrived on a flight from Geneva about 10 minutes before the first blast, told BFM television that the second, louder explosion brought down ceilings and ruptured pipes, mixing water with blood from victims. "It was atrocious. The ceilings collapsed," he said. "There was blood everywhere, injured people, bags everywhere." "We were walking in the debris. It was a war scene," he said. At Maalbeek, black smoke and clouds of dust billowed from the station entrance, about a hundred meters (yards) from the European Commission, the EU's executive arm. More than a dozen people were seen lying on the pavement outside with bloodied faces and were being treated by emergency services. The metro operator later said the metro service, along with trams and buses, was being closed down. The blasts come four days after Belgian police arrested a key suspect in the November 2015 attacks in Paris.