Dozens of people armed with sticks and fireworks set a tram on fire in Amsterdam on Monday. On Tuesday, the police are warning of further violence.
"We have signals that there are calls for similar" unrest in the western parts of the city, says Olivier Dutilh at the police during a court hearing.
The fire in the tram on Monday evening could be quickly extinguished and the square where it happened was evacuated, according to the police. Images of people destroying property and using fireworks are spreading on the internet.
According to the police, it is unclear how the unrest began and whether there are connections to what happened last week, when five people were taken to hospital and several were arrested in connection with a match between Dutch Ajax and Israeli Maccabi Tel Aviv. Then, youths sought out Israeli fans, assaulted them, and fled from the police, according to the city's mayor.
Four of those arrested last week are still in custody. Two of them are under 18 years old. Five people were arrested on Monday as a result of the violence last week. Of these, four are in custody, and the fifth has been released but is still suspected of a crime.
In the Netherlands, the violence has led to a comprehensive debate about anti-Semitism and how to prevent violence against Jews and other groups in the future.
The mayor has banned all demonstrations in the city and declared parts of Amsterdam as risk areas where the police can stop and control anyone.
