JERUSALEM >> The Israeli military said Saturday that three rockets were launched from Syria toward Israeli territory, a rare attack from the country’s northeastern neighbor that comes after days of escalating violence on multiple fronts.

There was no immediate claim of responsibility for the rocket launches, which caused no damage or casualties. Only one rocket managed to cross into Israeli territory and landed in a field in the Israeli-annexed Golan Heights, the Israeli military said. Fragments of another destroyed missile fell into Jordanian territory near the Syrian border, Jordan’s military reported.

In Syria, an adviser to President Bashar Assad described the rocket strikes as “part of the previous, present and continuing response to the brutal enemy.”

In the occupied West Bank, Israeli security forces fatally shot a 20-year-old Palestinian in the town of Azzun, Palestinian health officials said, stirring protests in the area. The Israeli military said troops fired at Palestinians hurling stones and explosive devices. The Palestinian Health Ministry identified the Palestinian killed as Ayed Salim.

His death came at a time of unusually heightened violence in the West Bank. Over 90 Palestinians and have been killed by Israeli fire so far this year, at least half of them affiliated with militant groups, according to a tally by The Associated Press.

Palestinian attacks on Israelis have killed 19 people in that time — including on Friday two British-Israelis shot to death near a settlement in the Jordan Valley and an Italian tourist killed by a suspected car-ramming in Tel Aviv. All but one were civilians.

The rocket fire from Syria comes against the backdrop of soaring Israeli-Palestinian tensions touched off by an Israeli police raid on Jerusalem’s most sensitive site, the sacred compound home to the Al-Aqsa mosque. That outraged Palestinians marking the holy fasting month of Ramadan and prompted militants in Lebanon — as well as Palestinian militants in the Gaza Strip — to fire a heavy barrage of rockets into Israel.

In retaliation, Israeli warplanes struck sites allegedly linked to the Palestinian militant group Hamas in Gaza and southern Lebanon.

Late Saturday, tensions ran high in Jerusalem as a few hundred Palestinian worshippers barricaded themselves in the mosque, which sits on a hilltop in the heart of Jerusalem’s Old City sacred to both Muslims and Jews. Israeli police efforts to evict the worshippers locked in the mosque overnight with stockpiled firecrackers and stones spiraled into unrest in the holy site earlier this week.

The latest escalations prompted Israeli Defense Minister Yoav Gallant to extend a closure barring entrance to Israel for Palestinians from the occupied West Bank and Gaza Strip for the duration of the Jewish holiday of Passover, while police beefed up forces in Jerusalem on the eve of sensitive religious celebrations.

In a separate incident in the northern West Bank city of Nablus late Saturday, a leader of a local independent armed group known as the Lion’s Den claimed the group executed an alleged Israeli collaborator who had tipped off the Israeli military to the locations and movements of the group’s members. Israeli security forces have targeted and killed several of the group’s key members in recent months.

The accused man’s killing could not be immediately confirmed, but videos in Palestinian media showed medics and residents gathered around his bloodied body in the Old City, where the Lion’s Den holds sway. “Traitors have neither a country nor a people,” Lion’s Den commander Oday Azizi said in a statement.

The moves come at a time of heightened religious fervor — with Ramadan coinciding with Passover and Easter celebrations. Jerusalem’s Old City, home to key Jewish, Muslim and Christian holy sites, has been teeming with visitors and religious pilgrims from around the world.

Gallant said that a closure imposed last Wednesday, on the eve of Passover, would remain in effect until the holiday ends on Wednesday night. The order prevents Palestinians from entering Israel for work or to pray in Jerusalem this week, though mass prayers were permitted at the Al-Aqsa Mosque on Friday. Gallant also ordered the Israeli military to be prepared to assist Israeli police. The army later announced that it was deploying additional troops around Jerusalem and in the West Bank.

Over 2,000 police were expected to be deployed in Jerusalem on Sunday — when tens of thousands of Jews are expected to gather at the Western Wall for the special Passover priestly blessing. The Western Wall is the holiest site where Jews can pray and sits next to the Al-Aqsa Mosque compound, where large crowds gather each day for prayers during Ramadan.

Jerusalem police chief Doron Turgeman met with his commanders on Saturday for a security assessment. He accused the Hamas militant group, which rules the Gaza Strip, of trying to incite violence ahead of Sunday’s priestly blessing with false claims that Jews planned to storm the mosque.

“We will allow the freedom of worship and we will allow the arrival of Muslims to pray,” he said, adding that police “will act with determination and sensitivity” to ensure that all faiths can celebrate safely.

The current round of violence erupted earlier in the week after Israeli police raided the mosque, firing tear gas and stun grenades to disperse hundreds of Palestinians who had barricaded themselves inside. Violent scenes from the raid sparked unrest in the contested capital and outrage across the Arab world.

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Associated Press writer Abby Sewell in Beirut, Jill Lawless in London, Frances D’Emilio in Rome and Joseph Krauss in Ottawa, Canada, contributed to this report.