* Muslims urged not to use them, prayers held outside
* Tensions high before Friday, Hamas urges protests
Prime Minister Benjamin Netanyahu is weighing whether to remove metal detectors at a Jerusalem holy site whose installation after a deadly attack last week has stoked Palestinian protests, an Israeli cabinet minister said on Thursday.
There have been nightly confrontations between Palestinians hurling rocks and Israeli police using stun grenades in Israeli-annexed East Jerusalem since the devices were placed on Sunday at entrances to the Noble Sanctuary compound.
Tensions remain high ahead of Friday prayers when thousands of Muslims usually flock to al-Aqsa mosque, Islam's third holiest shrine, in the compound above Judaism's sacred Western Wall.
Muslim religious authorities, who say the metal detectors violate a delicate agreement on worship and security arrangements at the site, have been urging Palestinians not to pass through, and prayers have been held near an entrance to the complex.
Ismail Haniyeh, leader of the Hamas Islamist movement that rules Gaza, called on Palestinian demonstrators to confront Israeli troops along the enclave's border on Friday in protest at the Israeli measure.
Netanyahu was due to hold security consultations over the issue, and likely decide on a course of action, on his return to Israel later in the day from visits to France and Hungary, Public Security Minister Gilad Erdan said.
Far-right members of Netanyahu's government have publicly urged him to keep the devices in place at the flashpoint site, but Israeli media reports said security chiefs were divided over the issue amid concerns of wider protests in East Jerusalem and the West Bank.
"The prime minister is considering whether to change this decision, and that's his prerogative," Erdan said on Army Radio. He described the equipment as a legitimate security measure.
Last Friday, three Arab-Israeli gunmen shot dead two Israeli policemen outside the Temple Mount-Noble Sanctuary complex in one of the most serious attacks in the area in years. The assailants were killed by security forces.
