More than a dozen men hurled firebombs at a synagogue in Gothenburg in southern Sweden hours after locals marched in the city against the United States’ recognition of Jerusalem as Israel’s capital.No one was injured in the attack Saturday night, which ended without injury, the online edition of the Expressen daily reported.Dvir Maoz, the World Bnei Akiva youth movement’s emissary in Gothenburg, told JTA that the attack happened a little after 10 p.m. while youths from the local Jewish community were attending a party inside the synagogue complex. Looking outside from inside the synagogue lobby area, he said he saw in the corner of his eye “a ball of fire” approaching the building. “The guards saw it in the security cameras and called police right away. The children were stressed, it was the first time they had ever experienced a terrorist attack near them.”The children’s parents were called to take them home after police arrived at the scene and scanned the area to make sure it was safe to come out, he said. The culprits had already left by the time police arrived. The building did not sustain any substantial damage that he could see, Maoz added.As they waited for police to arrive, the children were taken down to the basement floor for safety, Laila Takolander, a member of the local Jewish community, told the Expressen daily.Hours before the attack, which police are investigating, several hundred people marched through the city’s center in protest of President Donald Trump’s declaration on Wednesday that the United States recognizes Jerusalem as Israel’s capital, George Braun, the head of the community, told JTA. Police do not have suspects in custody.The European Jewish Congress called Sweden, as well as other European countries, to take strong punitive action after this attack. “It is unconscionable that Jews are under attack on the streets of Europe, whether by terrorists hurling Molotov cocktails or openly and brazenly calling for the mass murder of Jews in Malmo, Vienna and Paris,” EJC President Dr. Moshe Kantor said. “We call on European governments to take strong punitive action against those who perpetrated these acts and call for the immediate arrest of anyone who makes anyone making murderous chants.”Three people were arrested early on Sunday in Gothenburg, a spokeswoman for the Swedish Prosecution Authority said.At other protest rallies about Jerusalem in Sweden, Austria and France participants chanted, respectively, in Arabic about shooting Jews, an ancient massacre of Jews [during the times of Islamic expansion] and freedom for Palestinian terrorists.The Swedish rally where chants about shooting Jews were heard happened on Friday night in the southern city of Malmo, Sveriges Radio reported.“We have announced the intifada from Malmö. We want our freedom back, and we will shoot the Jews,” some of in the rally of 200 demonstrators shouted, according to the public radio station. Intifada is the Arabic-language word for a violent uprising.Earlier that day in Vienna, hundreds of participants in rally shouted in Arabic, “Jews, remember Khaybar, the army of Muhammad is returning.” The cry relates to an event in the seventh century when Muslims massacred and expelled Jews from the town of Khaybar, located in modern-day Saudi Arabia.And in France, around 400 people gathered at Republique square Saturday, where they cheered when an organizers, wearing a shirt that promotes a boycott of Israel, said: “This demonstration is also about freedom for Hassan Hamouri, Marwan Barghouti and all the Palestinian prisoner.” The crowd shouted back: “Freedom to the Palestinian prisoners.”Barghouti was sentenced by an Israeli court in 2004 to multiple life sentences for planning dozens of deadly terrorist attacks. Hamouri is a terrorist for the Popular Front for the Liberation of Palestine terrorist group who was arrested by Israel in 2005 and imprisoned following his conviction of planning to assassinate the late Israeli rabbi Ovadia Yosef.Hamouri, who is a French citizen, was released in exchange for the Israeli soldier Gilad Shalit, whom Hamas abducted in 2006. But he was arrested again, allegedly for violating the terms of his release by continuing to plan terrorist activities.The speaker at the Paris rally also urged listeners to show their “solidarity and resistance.” They chanted “Natanyahu war criminal” and called for the arrest of the Israeli Prime Minister, Benjamin Netanyahu, during his visit Sunday to France and Brussels, where he is scheduled to meet with several leaders of EU countries.A smaller protest rally than the one held on Republique took place in the eastern city of Lyon Saturday.Separately, Dutch police released from custody a 29-year-old Palestinian who on Thursday smashed the windows of a kosher restaurant in Amsterdam’s south while waving a Palestinian flag, the De Telegraaf daily reported. He will be tried on Dec. 20 for vandalism and theft, because he took out of the restaurant an Israeli flag before two police officers arrested him. The report did not whether he would also be tried for a hate crime.“It is highly morally objectionable to suggest that people want to murder a particular group because of a diplomatic statement, and no one would dare to suggest that any other group could justifiably be targeted because of what happens with a nation they are seen to be connected to,” Dr. Kantor said in reaction. “There is once again a double standard against Jews and anyone who suggests such an equation should be ashamed of themselves. Anyone who justifies antisemitic attacks on Jews, whether physical or verbal, places themselves in the category of an anti-Semite.”Reuters contributed to this report.