The probe into the Brussels terror attacks widened to other countries on Sunday with the arrest of an Algerian in Italy and a 32-year-old Frenchman in the Dutch port city of Rotterdam.
The Dutch police arrested the suspect at the request of French authorities, who suspect him of "involvement in planning a terror attack," prosecutors said. After a series of raids in Belgium and Germany, Italian police also arrested Algerian Djamal Eddine Ouali, who is suspected of making documents for militants linked to the bombings, Italian media said on Saturday. The Belgian press agency Belga reported that prosecutors had charged a man in connection with a raid in Paris on Thursday that authorities say foiled an apparent attack plot. The agency named him as Abderamane A., who prosecutors had said on Saturday was being held after being shot in a raid in the Brussels district of Schaerbeek.
Meanwhile, in Brussels the Belgian police briefly used water cannon to control several hundred rowdy protesters on Sunday after they ignored an official call for marches to be postponed following Tuesday's bombings.
During the day, the police carried out 13 new raids in and around Brussels and Antwerp in connection with the attacks. Nine people were questioned and five later released, the prosecutor's office said.
Hundreds nevertheless gathered at the Bourse to express solidarity with the victims of the suicide bomb attacks.
Most of the protests were peaceful, but riot police used the water cannon against a group of protesters, many of whom local media described as right-wing nationalists. They burst onto the square chanting and carrying banners denouncing Islamic State.
"It is highly inappropriate that protesters have disrupted the peaceful reflection at the Bourse [stock exchange]. I strongly condemn these disturbances," Prime Minister Charles Michel said, according to Belga news agency.