Nine Palestinians have been killed and 35 injured by Israeli forces during a major operation in Jenin in the occupied West Bank, the Palestinian health ministry says.Palestinian media reported that there were a series of air strikes as a large number of troops moved in to the city and its refugee camp, backed by drones, helicopters and armoured bulldozers.Israel’s prime minister said it launched an “extensive and significant” operation to “defeat terrorism” in Jenin, long seen as a stronghold of Palestinian armed groups.It comes three days after the start of a ceasefire in Gaza and highlights the threat of more violence in the West Bank, where suspected Israeli settlers also went on the rampage overnight.Jenin’s governor, Kamal Abu al-Rub, told AFP news agency that “what is happening is an invasion of the camp”, adding: “It came quickly, Apache [helicopters] in the sky and Israeli military vehicles everywhere.”The official Palestinian news agency, Wafa, cited local sources as saying that Israeli forces were “completely besieging” Jenin camp, and that armoured bulldozers had dug up several streets.It also cited the director of Jenin’s Government hospital, Wissam Bakr, as saying that three doctors and two nurses were among those wounded by Israeli gunfire.Palestinian security personnel reportedly withdrew from some of their positions around Jenin refugee camp before the Israeli forces moved in on Tuesday morning.Brig-Gen Anwar Rajab, a spokesman of the Palestinian security forces, told AFP that Israeli forces had “opened fire on civilians and security forces”, resulting in a number of injuries. On Tuesday evening, the Palestinian health ministry reported that eight men and a 16-year-old boy, whom it named as Mutaz Abu Tbeikh, had been killed by Israeli forces in Jenin. Another man was shot and killed by Israeli troops in the village of Tianik, about 8km (5 miles) to the north-west, it …