Clashes broke out between Palestinian protesters and Israeli police following Friday prayers at the Al-Aqsa Mosque compound,just hours after Israel and Hamas reached a ceasefire in Gaza.

According to a report of the Associated Press, it was unclear what sparked Friday’s violence. Police fired stun grenades and tear gas, and Palestinians hurled rocks after hundreds took part in a celebratory demonstration in which they waved Palestinian and Hamas flags and cheered the militant group. Israeli police said they arrested 16 people.

Protesters also clashed with Israeli troops in parts of the occupied West Bank, which has seen violent demonstrations in recent days linked to Jerusalem and Gaza.

According to earlier reports of UNB citing AP, it was reported that the ceasefire could face an early test on Friday as  tens of thousands of Palestinians were to  attend weekly prayers at the Al-Aqsa Mosque compound in Jerusalem, a flashpoint holy site revered by Jews and Muslims. Celebratory protests could spark confrontations with Israeli police, setting in motion another cycle of escalation like the one that led to the war.

Thousands took to the streets of Gaza as the cease-fire took hold at 2 a.m. Young men waved Palestinian and Hamas flags, passed out sweets, honked horns and set off fireworks. Spontaneous celebrations also broke out in east Jerusalem and across the occupied West Bank.

The 11-day war left more than 250 dead — the vast majority Palestinians — and brought widespread devastation to the already impoverished Hamas-ruled Gaza Strip. But the rocket barrages that brought life to a standstill in much of Israel were seen by many Palestinians as a bold response to perceived Israeli abuses in Jerusalem, the emotional heart of the conflict.

Meanwhile, Israeli Prime Minister Benjamin Netanyahu warned against further attacks, saying, “If Hamas thinks we will tolerate a drizzle of rockets, it is wrong.” He vowed to respond with “a new level of force” against aggression anywhere in Israel.

The Israeli leader, who is facing criticism from his hawkish base for ending the offensive prematurely, said Israel had done “daring and new things, and this without being dragged into unnecessary adventures.” He added that Israeli forces had caused “maximum damage to Hamas with a minimum of casualties in Israel.”