Association for Defending Victims of Terrorism – Two Swedish nationals have been shot dead and a third person injured in Brussels, in an attack which prosecutors are treating as terrorism.
The Belgium-Sweden Euro 2024 qualifier football match being played in the city was abandoned.
Brussels is on its highest terror alert as the gunman, who appeared to have an assault rifle, remains at large.
French President Emmanuel Macron, who was on a visit to Albania, said: “Europe has been shaken.”
Federal prosecutors say a terrorism inquiry has been opened over the shooting on Boulevard d’Ypres, 5km (3 miles) from the King Baudoin Stadium.
A spokesman for the prosecutor, Eric van Duyse, urged the public to “go home and stay at home as long as the threat has not been eradicated”.
He said a man claiming to be the attacker had said in a video on social media he had been inspired by the Islamic State group.
A video shows an Arabic-speaking man saying he carried out the attack in the name of God and that he killed three people.
The video and others uploaded during the attack are being verified by police, the BBC has been told.