Our Middle East correspondent, lucy williamson, has just sent this update from jenin. There are israeli jeeps, israeli armoured vehicles moving around the entrance tojenin s Government Hospital behind me. You can see an ambulance coming through now as well. The Hospital Entrance Isjust behind this Army Vehicle here. Staff inside the hospital say that since last night, the army has surrounded the building. And is searching anyone who wants to leave. This street, deserted now, one of the main roads through the town, has seen this kind of activity so many times since the hamas attacks last october. But this operation, looks a bit different, it is a part of a wider, coordinated operation across the northern West Bank. These kinds of operations going on in several cities. What is not entirely clear at the moment is why this operation is taking place now. The kind of extensive operation that People here havent seen in decades. Israels Foreign Minister says it is a Counterterrorism Operation