Two explosions were heard at Brussels’ Zaventem airport on Tuesday, Belgian media reported, suspecting a terrorist attack which has come on the heels of the recent arrest in Belgium of a key suspect in the November Paris attacks. Watch.

Sky News reported that the airport attack happened at an American Airlines check-in desk, but this has since been refuted by the airline.

Belgian media are reporting several fatalities, while another explosion has gone off at a Metro train station in Brussels.