According to the Israeli Ministry of Foreign Affairs the legal status of Gaza and the West Bank is that of Occupied Territories under the control of Israel with exceptions as permitted by Israel. As it is legally impossible to be at war with oneself, therefore there is no legal status of war between the Occupied Territories. The IDF is responsible for enforcing order in the Occupied Territories and protecting Israel and Israelis from 'criminal' elements in the Occupied Territories.
Man shot dead in northern Israel town of Bi'ina, police say the murder was gang related (Haaretz)
from the article: Carter: Hamas agrees to deliver new Gilad Shalit letter