Reports that Jewish extremists would create "provocations" spurred Jerusalem police to close the Temple Mount to Jewish visitors on Tisha b'Av.
Muslim leaders threatened to riot in return, leading to the closure on Sunday, according to reports. The calls for the provocations appeared on several websites, Ynet reported.
Muslims are observing the holy month of Ramadan, and Muslim worshipers reportedly were allowed on the Temple Mount on Sunday.
Jews on Tisha b'Av mark the destruction of the first and second Holy Temples. Their fast on the ninth of the Hebrew month of Av is actually being observed this year on the 10th because the ninth fell on Shabbat.
Thousands of Jewish worshipers gathered Saturday night at the Western Wall for a Tisha b'Av prayer service. Hundreds later joined in the annual march around the walls of the Old City.
On the eve of Tisha B'av Saturday, a group of American teenagers listening to recitation of Megillat Eichah fell briefly under a rock attack by youths described as Arabs at the Haas Promenade, a popular tour group destination that overlooks the Old City.
Two of the teens were struck but not injured. A security guard with the group responded immediately and chased the assailants away. The teens who were participating in Magen B'Aretz, a joint program of Camp Nesher and the Koby Mandell Foundation.