In pictures: Brussels blasts

Scores of people have been killed and wounded in attacks at Brussels international airport and a city metro station during the morning rush hour.

There has been heightened security in the Belgian capital since it emerged that several of the men behind last November's Paris attacks had come from Brussels.

Four days ago, a man suspected of involvement in the attacks, Salah Abdeslam, was arrested in Brussels after four months on the run.

What we know so far about Tuesday's attacks

Crisis information

A CCTV image released by Belgian officials shows three suspects at the airport

Two blasts tore through the departures hall at Zaventem airport at about 08:00 local time

Eyewitnesses said passengers lay on the ground to protect themselves as smoke filled the terminal

The scene shortly after the explosions was captured by Ketevan Kardava, from the Georgian Public Broadcaster

Passengers abandoned suitcases and pushchairs as they fled the scene

Belgian PM Charles Michel called the attacks "blind, violent and cowardly"

The force of the explosion blew out windows at the front of the airport terminal

Hundreds of travellers had to be evacuated

Little more than an hour after the airport blasts, Maelbeek metro station, near key EU buildings, was attacked

One eyewitness, Alexandre Brans, said: "The metro was leaving Maelbeek station when there was a really loud explosion. It was panic everywhere."

A carriage was destroyed in the blast; survivors escaped through a tunnel

Security has been beefed up in Brussels and many other European cities

People in Brussels have been gathering in the city's Place de la Bourse where a makeshift memorial has been created

The colours of the Belgian flag have lit up the Eiffel Tower in Paris...

... the Brandenburg Gate in Berlin...

... and the Trevi Fountain in Rome.