Zaventem Airport in Brussels, Belgium, has been struck by two explosions, killing 13 and injuring as many as 35 people.
The two blasts occurred in the departures area of the airport shortly after 8:00am local time.
The Belgian state broadcaster reported that the explosions were the result of a suicide attack.
All departing planes were cancelled, while arriving flights were redirected. Emergency services have been deployed to clear the airport arena completely.
Belgium's terror alert has been raised to the optimum level and security has been increased at all Parisian airports.
The airport has been closed and passengers have been barred from travelling to the region.
Belgium Prime Minister Charles Michel tweeted: "For the moment, we are asking people to stay where they are."
According to Belgium's Het Laatste Nieuws reports, more bombs were discovered at the site.
Explosions also occurred at a Brussels' subway station in the suburb of Maalbeek.
Ten people are reported to be killed at the metro station site, though numbers have not yet been confirmed by police.
The attacks occurred just four days after the prime suspect in the Paris attacks, Salah Abdeslam, was arrested in Brussels. However, the reason for the attacks is not yet known.