Israeli fans were assaulted after a soccer game in Amsterdam by hordes of young people apparently riled up by calls on social media to target Jewish people, Dutch authorities said Friday. Five people were treated at hospitals and dozens were arrested after the attacks, which were condemned as antisemitic by authorities in Amsterdam, Israel and across Europe.

Reports of antisemitic speech, vandalism and violence have been on the rise across Europe since the start of the war in Gaza, and tensions mounted in the Dutch capital ahead of Thursday night’s Europa League match between Ajax and Maccabi Tel Aviv.

Pro-Palestinian demonstrators were banned by local authorities from gathering outside the stadium, and video showed a large crowd of Israeli fans chanting anti-Arab slogans on their way to the game. Afterward, youths on scooters and on foot crisscrossed the city in search of Israeli fans, punching and kicking them and then fleeing quickly to evade police, Amsterdam Mayor Femke Halsema said.

On the social media platform Telegram, “there is talk of people going on a Jew hunt, Halsema said. That is so shocking and so despicable that I still cannot fathom it.” Dutch Minister of Justice and Security David van Weel vowed to track down and prosecute all of the perpetrators.

Police had to escort some fans back to hotels, according to authorities.

Ofek Ziv, a Maccabi fan from the Israeli city of Petah Tikva, said someone — he didn’t see who — threw a rock at him as he and a friend left the stadium. He was hit in the head, causing light bleeding. He said a group of men began to chase him, before he and his friend got into a taxi, picking up other fans. They took shelter at a hotel.

Im very scared, its very striking, Ziv said. And the police didnt come to help us.

Another Israeli fan, Alyia Cohen, said upon arriving back in Israel that he would go back to Amsterdam for future matches. We are not afraid of anything, ours is the people of Israel.

Five people were treated in the hospital and released, while some 20 to 30 people suffered light injuries, police said. At least 62 suspects were arrested, with 10 still in custody, the citys public prosecutor, Rene de Beukelaer, told reporters at a news conference Friday.

A statement from Prime Minister Benjamin Netanyahus office said he views the horrifying incident with utmost gravity. He demanded that the Dutch government take vigorous and swift action against those involved.

Condemnation of the violence poured in from around Europe. Antisemitism has absolutely no place in Europe, and we are determined to fight it and to fight all forms of hatred, said Ursula von der Leyen, the president of the European Commission. We want Jewish life and culture to thrive in Europe.

Dutch Prime Minister Dick Schoof condemned the violence and flew home early from a European Union summit in Hungary.

The attacks shattered Amsterdams long-cherished view of itself as a beacon of tolerance and haven for persecuted religions, including Sephardic Jews from Portugal and Spain who fled to the city centuries ago.

Police said security will be beefed up at Jewish institutions across the city, which has a large Jewish community and was home to Jewish World War II diarist Anne Frank and her family as they hid from Nazi occupiers.

Halsema, Amsterdams mayor, described the violence as an eruption of antisemitism that we had hoped never again to see in Amsterdam.

In the past, Ajax was known as a soccer club with links to Amsterdams Jewish community because visiting fans had to pass the citys Jewish quarter to get to the clubs former stadium. Ajax fans sometimes wave Star of David flags and chant the Dutch word for Jews.

Israels foreign minister, Gideon Saar, flew to Amsterdam on Friday and in a message on X he said that hatred of Jews is appearing in place after place after place.

Saar met with the Dutch minister for security and justice, pledging Israeli help in the investigation, and also held talks with Geert Wilders, a far right, anti-Islam lawmaker whose party won national elections last year.

Amsterdam police spokeswoman Sara Tillart said it was too early in their investigation to say if anybody other than soccer fans was targeted. Authorities outlawed demonstrations across the city for the weekend and gave police extra powers to frisk people.

Israels government initially ordered two planes sent to Amsterdam to bring fans home, but Netanyahus office later said it would work to help citizens arrange commercial flights.

Maccabis CEO, Ben Mansford, spoke to reporters at Israels international airport as some fans returned. Lots of people went to watch a football game ... to support Israel, to support the star of David, he said. For them to be attacked, thats very sad times for us all given the last year weve had.

Tensions had been brewing in Amsterdam for days ahead of the match. A Palestinian flag was torn down from a building in Amsterdam on Wednesday, Dutch broadcaster NOS reported, and authorities banned a pro-Palestinian demonstration near the stadium.

Ahead of the game, large crowds of supporters of the Israeli team could be seen on video chanting anti-Arab slogans as they headed to the stadium, escorted by police.

Let the IDF win, and (expletive) the Arabs, the fans chanted, using the acronym of the Israeli military, as they shook their fists. It also showed police pushing several pro-Palestinian protesters away from a Maccabi fan gathering in a square earlier in the day.

Security issues around hosting games against visiting Israeli teams led the Belgian soccer federation to decline to stage a mens Nations League game in September. That game against Israel was played in Hungary with no fans in the stadium.

Israel was exiled from the Asian Football Confederation in the 1970s after Arab nations refused to play against it. Israel played in European qualifying for the 1982 World Cup and has been a member of European soccer body UEFA since 1994.

The violence in Amsterdam will no doubt lead to a review of security at upcoming matches involving Israeli teams. UEFA had announced Monday that a Maccabi match initially to be played in Istanbul on Nov. 28 against the Turkish team Besiktas, would be moved to a yet-to-be-decided neutral venue.

Italian police said security was increased for Maccabi Tel Avivs basketball game at Virtus Bologna Friday night, both for fans and for the Maccabi team.

Israels national soccer team is scheduled to play France in Paris on Nov. 14 in the Nations League. French Interior Minister Bruno Retailleau said Friday the match would go ahead as planned.

I think that for a symbolic reason we must not yield, we must not give up, he said, noting that sports fans from around the world came together for the Paris Olympics this year to celebrate the universal values of sports.