The unrest began on Friday night when a police patrol in Anderlecht, a district of Brussels, attempted to stop a 19-year-old driving on a scooter. /Oliver Gouallec / Belga / AFP

The unrest began on Friday night when a police patrol in Anderlecht, a district of Brussels, attempted to stop a 19-year-old driving on a scooter. /Oliver Gouallec / Belga / AFP

Forty-three people were detained by police in Brussels on Saturday after a riot broke out following a fatal accident between a police vehicle and a young man on a scooter, authorities said.

The unrest began on Friday night when a police patrol in Anderlecht, a district of Brussels, attempted to stop a 19-year-old driving on a scooter.

The police gave chase, but the scooter collided head on with a second police vehicle killing the scooter driver on the spot.