JERUSALEM — Israeli police clashed with Palestinian protesters on Tuesday in a third straight day of unrest at Jerusalem’s most sensitive holy site. Police entered the Al-Aqsa mosque compound early in the morning to disperse a group of protesters who had holed up inside the mosque overnight, said police spokeswoman Luba Samri. The protesters threw rocks, fireworks, concrete blocks and a firebomb at the officers, she said, adding that two Palestinians were arrested and five police officers were slightly injured in the violence. Azzam Khatib, the director of the Waqf — the Islamic religious authority that oversees the compound — said Israeli police entered deep inside the mosque in what he called “a very dangerous development.”