Clashes between Israelis and Palestinians on the West Bank resulted in hundreds of injuries and the death of a Palestinian teenager on Sunday. The recent escalation in violence is a reaction to Israel’s decision of restricting Palestinians from entering Jerusalem’s Old City with the exception of residents.

The clashes intensified on Monday after Israeli forces shot and killed Huthayfa Soliman, 18. According to the Israeli military, he and others were throwing firecrackers, rocks, and firebombs at the soldiers at a checkpoint near Tulkarm, in the northern West Bank.

The Palestine Red Crescent Society told Al Jazeera that nearly 400 people have been injured in the recent clashes. The humanitarian organization reported that in two incidents, Jewish settlers have smashed ambulances and physically attacked their staff members.

The escalation in violence began Thursday when Palestinian gunmen killed a Jewish couple near a settlement in the occupied West Bank. Two days later, two ultra-Orthodox Jewish men were fatally stabbed by a Palestinian teenager in the Old City of Jerusalem. Hours later, a Palestinian man stabbed and wounded a 15-year-old Jewish boy in a Jerusalem neighborhood. Palestinians have also shut themselves inside the Al-Aqsa mosque, blocking all entrances and throwing firebombs at police.

The Guardian reported that Israel’s Prime Minister Benjamin Netanyahu vowed a harsh offensive against “Palestinian Islamic terror” on Sunday. In a televised announcement, he said there would be a series of measures, including the “speeding up of the process for the demolition of the homes of terrorists.”

The Palestinian state news agency reported that Palestinian President Mahmoud Abbas appealed the United nations for an international force to be deployed in the West Bank. Abbas has increasingly asked for outside forces.