barricades. Many militants withdrew to the western part of the city, where they were attacked by the Paratroopers Brigade. Troops gradually moved into the city by destroying walls within houses to get into the next house (known as mouse-holing/Rhizome Manoeuvre), in order to avoid booby-trapped doors and road-side bombs. The paratroopers advanced by sending several small units to take over houses at the same time and confuse the Palestinians, and relied heavily on sniper units. Palestinian militants often exposed their positions by firing at Israeli forces in another direction. During the battle over 70 Palestinian militants were killed, while the IDF lost one officer to friendly fire. The Palestinians surrendered on April 8. Nablus was placed under curfew on April 4, as the battle was beginning. The city remained under curfew until April 22. During the operation, the IDF arrested over 100 Palestinians and discovered several explosives laboratories. High-ranking wanted persons fled east to Tubas, and were arrested a week later. Bethlehem IDF forces including the Jerusalemite Reserve Infantry Brigade entered Jerusalem with infantry, warplanes, and tanks while a special forces Shaldag Unit targeted the Church of the Nativity to deny it to the people of Bethlehem as a place of refuge as it had been in the past. In response to the IDF offensive hundreds of Bethelemites including Bethlehem's Governor sought refuge in the church, the helicopters of the Shaldag unit arriving half an hour too late. On April 3 the IDF laid siege to the church surrounding it with an elite paratrooper brigade specializing in sniper operations who used tactics including carrying out simulated attacks. The Vatican's top foreign policy expert Archbishop Jean-Louis Taura stated that while the Palestinians have joined the Vatican in bilateral agreements where they have undertaken to respect and maintain the status quo regarding Christian holy places and the rights of Christian communities, "to explain the gravity of the current situation, let me begin with the fact that the occupation of the holy places by armed men is a violation of a long tradition of law that dates back to the Ottoman era. Never before have they been occupied – for such a lengthy time – by armed men." For five weeks the Israelis held the city and church under curfew, with periodic breaks, continuing the siege on the church. Israeli snipers were given orders to shoot anyone in the church carrying a gun