JERUSALEM (Reuters) - Three Arab-Israeli gunmen shot dead two Israeli policemen near one of Jerusalem’s most holy sites on Friday and were then killed by security forces, police said, in one of the most serious attacks in the area for years.

Israeli authorities shut the area to Muslims gathering for Friday prayers citing security concerns, prompting anger among Palestinian religious leaders. The Grand Mufti of Jerusalem, Mohammad Hussein, urged Palestinians to defy the closure and he was later reported to have been detained.

Palestinian President Mahmoud Abbas condemned the attack in a phone call with Israeli Prime Minister Benjamin Netanyahu, but also said closing down the area could have repercussions.

The three gunmen arrived at the sacred site - known to Muslims as the Noble Sanctuary and to Jews as Temple Mount - on the edge of Jerusalem’s Old City and walked towards one of the nearby ancient stone gates, police spokeswoman Luba Simri said.

“When they saw the policemen they shot towards them and then escaped towards one of the mosques in the Temple Mount compound,” Simri said. “A chase ensued and the three terrorists were killed by police.”

Ten seconds of security camera footage released by police appeared to show two of the attackers running toward two policemen stationed in a stone passageway and shooting one of them in the back.

Mobile phone video footage aired by Israeli media showed several police chasing a man and shooting him at the site, a popular place for foreign tourists to visit.

Simri said three firearms were found on the gunmen’s bodies. The Shin Bet, Israel’s internal security service, said they were all Arab citizens of Israel who were unknown to the authorities.

The two policemen killed were Israeli Arab citizens from the country’s Druze community. The Israeli ambulance service said a third policeman had been lightly wounded in the incident.

TENSIONS

Tensions are often high around the compound, which houses the Aqsa Mosque and the golden Dome of the Rock. It is managed by Jordanian religious authorities and is adjacent to the Western Wall, a holy site where Jews are permitted to pray.

United Nations Secretary General Antonio Guterre condemned the attack. “This incident has the potential to ignite further violence. All must act responsibly to avoid escalation,” his spokesman said.

Netanyahu said the compound would be reopened gradually from Sunday, in accordance with security assessments.

Slideshow ( 14 images )

Jordan’s government spokesman Mohammad Al Momani called on Israel to end the closure, which he described to Petra news agency as an “attack on the right of Muslims to practise their religious rituals in their holy sites”.

A source close to Netanyahu said Israel expected Jordan to condemn the attack.

The compound has served as a tinder-box for the Israeli-Palestinian conflict in the past. Under a delicate status quo agreement, Jews are allowed to enter the compound under closer supervision but only Muslims are permitted to pray.

Slideshow ( 14 images )

In an apparent effort to ease tensions, Netanyahu said in a statement there would be no change to the status quo, in which only Muslim prayer is permitted, a message he reiterated in his phone call with Abbas, according to Netanyahu’s office.

Authorities have often restricted access to the Aqsa mosque when concerned about possible violence there, but a total shutdown is rare.

Friday’s closure prompted hundreds of Muslim worshippers to gather outside the walled Old City gates and hold prayers there.

“We completely reject the ban by Israeli authorities,” Grand Mufti Hussein told Reuters by telephone. “We have urged our Palestinian people to rush to al Aqsa today and every day to hold their prayers.”

An aide to Hussein said the Mufti was later detained by police at the Old City. A police spokesman could not confirm that report. Reuters video footage showed the Mufti being escorted away by a man in plain clothes, through a crowd of Palestinians gathered near the compound gate.

Ofer Zalzberg, senior analyst at the International Crisis Group think-tank, said images of the gunman being shot dead at the sacred site made the situation even more volatile.

“This can have much broader impact because defending al Aqsa is at the core of Palestinian nationalism,” Zalzberg told Reuters. “Israel’s response of closing access entirely to Muslims in an attempt to deter further attacks actually exacerbates the crisis.”

No group claimed responsibility for the attack, though the Palestinian Islamist group Hamas, which rules the Gaza Strip, praised it.

A wave of Palestinian street attacks that began in 2015 has slowed but not stopped. At least 257 Palestinians and one Jordanian citizen have been killed since the violence began. A few of the attacks were carried out by Arab Israeli citizens.

Israel annexed East Jerusalem, where the Old City and the holy compound are located, after the 1967 Middle East war and regards all of Jerusalem as its capital, a claim not recognised internationally.

Palestinians want East Jerusalem as the capital of a state they hope to establish in the West Bank and Gaza Strip.