JERUSALEM (JTA) — Hundreds of Muslims wearing masks rioted on the Temple Mount.

Riots began Monday morning when the site opened to Jewish and Christian visitors.

The rioters threw rocks and firecrackers at the police officers on the site, injuring at least five of them, according to reports.

The rioters retreated to the al-Aksa Mosque, where several of them were arrested, Ynet reported.

The site later opened to visitors.

The rioting occurred on the eve of Tisha B’Av, a 25-hour fast which marks the destruction of both the First and Second Temples in Jerusalem. Tens of thousands of visitors visit the Western Wall during special prayer services for the fast day.

Meanwhile, overnight Sunday and early Monday morning police arrested 12 people for rioting in eastern Jerusalem. Police said that some 430 Arabs have been arrested in the last month for rioting in the city.