Israeli organization B'Tselem states that there have been "grave violations" of Palestinian human rights in Hebron because of the "presence of the settlers within the city." The organization cites regular incidents of "almost daily physical violence and property damage by settlers in the city", curfews and restrictions of movement that are "among the harshest in the Occupied Territories", and violence by Israeli border policemen and the IDF against Palestinians who live in the city's H2 sector. According to Human Rights Watch, Palestinian areas of Hebron are frequently subject to indiscriminate firing by the IDF, leading to many casualties. One former IDF soldier, with experience in policing Hebron, has testified to Breaking the Silence, that on the briefing wall of his unit a sign describing their mission aim was hung that read: "To disrupt the routine of the inhabitants of the neighbourhood." Hebron mayor Mustafa Abdel Nabi invited the Christian Peacemaker Teams to assist the local Palestinian community in opposition to what they describe as Israeli military occupation, collective punishment, settler harassment, home demolitions and land expropriation.