Two explosions erupted at the Zaventem airport in Brussels, according to initial reports.
Footages and images released on social media showed rising smoke on the terminal, as well as people fleeding the area with panic.
Causalities have not been confirmed yet, and the reason of the explosion is unknown. The airport has been evacuated and closed to flights, while train transportation to the airport has been halted, according to local media.
Salah Abdeslam, the main suspect of the deadly Paris terror attacks in November was caught in Brussels four days ago.