Israeli Occuparion security forces detained Palestinian protesters, as settlers gathered at Damascus Gate to mark "Jerusalem Day," to commemorate the city's unification following the capture of east Jerusalem in 1967.

Videos published on social media documented the attacks by the cops against young weaponless Palestinian men and women.

Jerusalem braced for a controversial "Flag March" on Sunday as Israeli Occupation mobilised to commemorate the city's unification and Palestinian groups threatened retaliation over the annual rally that sparked a war last year.

Hours before the march was to begin, tensions were high in Jerusalem's Old City, where an extreme-right Jewish lawmaker and other Jewish nationalists visited the flashpoint Al-Aqsa mosque compound chanting pro-Israeli Occupation slogans.

Al-Aqsa is Islam's third holiest place and also Judaism's holiest site.

Israeli Occupation police said a small group of Palestinians threw large rocks towards officers from inside the Al-Aqsa mosque. There were no reported injuries.

Last year on "Jerusalem Day," Hamas fired rockets at the city after weeks of tension between both parties after Israeli Occupation were attempting to evict residents from the Sheikh Jarrah neighborhood.

This triggered an 11-day war between the Jewish state and armed groups in the Gaza Strip, which is an open air prison.

Fighting cost the lives of 260 Palestinians, including 66 children, according to the Gaza health ministry. Fourteen people were killed in Israeli Occupation, including two children, according to Israeli Occupation authorities.