Four Palestinians have been killed during an early-morning Israeli raid in occupied Palestine, the Palestinian health ministry said as violence escalated in the restive area, AFP reports.

According to the official Palestinian agency Wafa, “more than 100 military vehicles and two bulldozers” took part in the raid which took place in the city and its refugee camp — a stronghold of Palestinian armed groups and the target of frequent military incursions.

The four were aged between 23 and 28, and another nine people were wounded, a ministry statement said.

Military drones hovered over the area during the raid, while snipers were positioned on buildings around Jenin’s main hospital, Wafa said.

Part of the hospital’s perimeter wall was also demolished by military bulldozers. The Israeli military did not immediately comment on the incident.