Scenes of destruction in Brussels following 3 explosions

At least 30 people are dead and many more injured after several explosions at the airport and in the subway system of the Belgian capital. ISIS has claimed responsibility for the attack.

An unidentified traveller lies on the ground in the smoke-filled terminal at Zaventem airport. (Ralph Usbeck via Associated Press)

A man with blood stains on his sweater leaves the Zaventem airport. (Dirk Waem/AFP/Getty Images)

Passengers walk away from the airport after the explosions. (Sylvain Lefevre/Getty Images)

A victim receives first aid from rescuers on Tuesday, following an explosion at Maelbeek metro station in Brussels. (Emmanuel Dunand/AFP/Getty Images)

Those injured in the attacks are being treated at the military hospital in Neder-over-Heembeek in northern Brussels. (EPA)

Passengers leave a train in the Brussels metro system. (Evan Lamos/EurActiv/Associated Press) 

Belgian emergency vehicles attend the scene on Rue de la Loi, near the Maelbeek metro station. (Olivier Hoslet/EPA)

A television image shows a Belgian soldier and police carrying an injured person from the metro station. (EPA)

A private security guard helps a wounded woman outside the metro station. (Michael Villa/AFP/Getty Images)

Belgian police carry out searches inside a metro station. (Nicolas Maeterlinck/AFP/Getty Images)

Forensic police enter the metro station. (Philippe Huguen/AFP/Getty Images)

According to Belgian French-language daily newspaper La Dernière Heure, this CCTV security image shows three men suspected of participating in the bombings at Zaventem airport near Brussels. (La Dernière Heure)

Windows were shattered at Zaventem airport, where two explosions took place. (Patrik Stollarz/AFP/Getty Images)

An injured woman leaves the airport. (David Crunelle/Associated Press)

Two injured women wait for assistance at the airport. (Ketevan Kardava/Georgian Public Broadcaster/Associated Press)

Passengers and airport staff gather outside the terminal building at the airport. (Oliver Hoslet/EPA)

An injured man lies on the ground inside the airport. (Ketevan Kardava/Georgian Public Broadcaster/Associated Press)

Belgian police stand guard at Midi train station in Brussels. (Christian Hartmann/Reuters)

A man kneels before a makeshift memorial outside the stock exchange in Brussels. (Geert Vanden Wijngaert/Associated Press)

A young girl lights a candle at the Place de la Bourse in Brussels. (Carl Court/Getty Images)

CBC's Nahlah Ayed has been tweeting from Brussels: