Amsterdam police arrested eight youths in the suburb of Slotervaart on Wednesday night. Three were carrying jerry cans, five others were taken into custody on suspicion of planning to cause trouble, a police spokesman said on Thursday.

Later a car was set on fire, news agency ANP reported. It was the third night in a row that a car has been set alight close to the police station where Bilal B. attacked two police officers with a knife and was shot dead.
Despite the car blaze and heavy police presence, the area was mainly quiet, police said.
On Wednesday, local council chairman Ahmed Marcouch called on the police to get tough on the troublemakers – a hard core of some 20 to 30 youths. The arrests on suspicion of planning to cause trouble is part of this new approach, NOS tv said.
Amsterdam police chief Bernard Welten told a tv talk show on Wednesday evening that he was constantly aware that trouble could break out.