Arab Israelis are descendants of Palestinians who remained on their land following the creation of the state of Israel in 1948.
According to various media reports, Israeli police used both live and rubber bullets as well as tear gas to disperse Palestinian protesters after the prayers ended.
On Friday, three Israelis were stabbed to death in a private home in the West Bank illegal settlement of Halamish. The Israelis died in a subsequent attack near Ramallah in the West Bank when four Israeli citizens were stabbed.
He was shot by a neighbour and taken to hospital.
Tensions have run high since last week, when three gunmen shot and killed two Israeli policeman near Temple Mount, a hilltop compound near the Western Wall and one of the most important holy sites in Judaism, Islam and Christianity.
Israeli Prime Minister Benjamin Netanyahu stressed the metal detectors were meant to ensure the safety of worshippers and visitors and not an attempt to disturb the fragile status quo under which Jordan is custodian of the site and Jewish prayer is forbidden.
Israeli authorities say most of the Palestinians killed were carrying out knife, gun or car-ramming attacks.
The cameras were spotted Sunday as Israel said it was considering an "alternative" to the metal detectors at the contested shrine that set off a weekend of violence.
The Israeli military said the assailant killed a man and two of his adult children, while a woman was wounded.
On Saturday, entrances to Jerusalem's walled Old City were open amid heavy security.
Muslim leaders called for mass gatherings to protest the erection of the metal detectors.
During the attack the mother, also in her 60s, managed to hide several of the grandchildren - who were unharmed - in another room while she called police and shouted that a terrorist had entered her home.
"Police are coordinating to enable Friday prayers to take place and at the same time security measures are taking place", spokesman Micky Rosenfeld said.
Israeli officials have said they will not remove metal detectors from outside a Jerusalem mosque, despite their installation triggering rapidly escalating confrontations with Palestinians. We don't want to change the political or religious status quo, nor the situation on the ground.