Riot police in central Amsterdam intervened to break up a demonstration on Monday afternoon, after pro-Palestine campaigners refused to leave their location close to the cityβs main railway station and go home.
In total, some 320 people were arrested, police said later on Monday evening.
Mayor Femke Halsema orded the demonstration be ended because of public order offences. Some demonstrators had set off fireworks and others had sought confrontation with the police.
Some protestors also attempted to break up a gathering in support of Israel on the Dam in the city centre, where arrests were also made.
Earlier in the day Halsema called on the cityβs residents to support each other on the anniversary of the attacks by Hamas in Israel.
βGrief is not political. Give each other space,β Halsema said in a post on Instagram in which described October 7 as an βemotionally charged day, especially for Jewish Amsterdammersβ.
But the mayor also defended the right of protesters to speak out against Israelβs bombardment of Gaza, which has led to the deaths of more than 41,000 Palestinians, according to estimates by Gazaβs health ministry.
Halsema and prime minister Dick Schoof will attend the official commemoration of the October 7 attacks, in which 1,200 people were killed and 250 others taken hostage, in Amsterdam later on Monday.
Sit-ins in support of Palestine are also being held at railway stations nationwide.
Some hostages have died in captivity and 117 have been released, but some 97 are still being held or are unaccounted for.