|Palestinian National Security Forces|
|Service branches||* National Security Forces|
* Military Intelligence
* Military Liaison
* Naval Police 
The Palestinian National Security Forces (NSF; Arabic: ? ) are the paramilitary security forces of the Palestinian National Authority. The name may either refer to all National Security Forces, including some special services but not including the Interior Security Forces, the Presidential Guard and General Intelligence, or refer to the main force within the National Security Forces.
The Palestinian National Security Forces engage in various activities, including general law enforcement. A rough estimate of the total strength as of 2007 is 42,000 troops. As the Israeli-Palestinian conflict goes on, the security forces notably co-operate with other law enforcement agencies, such as arresting militant sub-groups and assisting the Israeli government with prosecuting those picked up. According to The Jerusalem Post, "In the past, Palestinian security forces have released arrested terrorists and then quietly tipped off Israel to mitigate internal public criticism against handing over Palestinians to Israel."
As part of the Oslo Accords, the Palestinian National Authority (PNA) was authorized to recruit and train a police force with paramilitary capabilities, but was not permitted to have a military force. Several bilateral agreements between the PNA and Israel regulate the size of the force, its structure, armament, and composition. The agreements provide Israel with the right to review potential recruits and withhold approval of those with a terrorist background. They were not enforced, however, with the result that the actual size and equipment of the force in 2002 exceeded what was permitted.
Initially, Yasser Arafat set up a string of 14 overlapping and often competing security forces, each one controlled by a rival political or former guerrilla chieftain, but all of them ultimately loyal to him and his Fatah party.
The National Security Forces engage in various activities, including general law enforcement. The Military Intelligence collects external military intelligence. It became the NSF Military Intelligence Department. The Military Police is a separate unit. The Military Liaison coordinates security with Israel and participated in joint Israeli-Palestinian patrols in the past. The main task of the Naval Police was to protect the territorial waters in Gaza until the imposition of the Gaza blockade.
From the late 1990s, the CIA played the central role in building up PA security forces, in close co-operation with the Israeli military and intelligence. After the killing of three US officials in the Gaza strip in 2003, British forces played an increasingly active role.
The Palestinian Preventive Security Force played a significant role during the Al-Aqsa Intifada. It participated in major operations such as Operation Defensive Shield. They also took part in battles such as the Battle of Jenin and the Siege of the Church of the Nativity in Bethlehem
According to The Guardian, based on the Palestine Papers, in 2003, British Prime Minister Tony Blair approved a plan of the Secret Intelligence Service MI6 for a US-led "counter-insurgency surge" against Hamas. MI6 proposed a secret plan to crush Hamas and other armed groups on the West Bank. It included internment of leaders and activists, closure of radio stations and replacement of imams in mosques. The plan recommended inter alia
"Degrading the capabilities of the rejectionists - Hamas, PIJ [Palestinian Islamic Jihad] and the [Fatah-linked] Al Aqsa Brigades - through the disruption of their leaderships' communications and command and control capabilities; the detention of key middle-ranking officers; and the confiscation of their arsenals and financial resources".
In March 2005, a secret British "Palestinian Security Plan" was presented with detailed proposals for a new security taskforce, based on "trusted PA contacts" outside the control of "traditional security chiefs", a British/US security "verification team", and "direct lines" to Israeli intelligence. The document notes that Israel was not content with the functioning of the NSF and opposed enhancement of the organisation with munitions and surveillance equipment. In a "subtle approach", the "old guard" could be retired with honour, "with subtle timing, once the decisions are made and the new structures are emerging" ... "The Israeli occupation has totally destroyed the capability of the NSF itself [in the West Bank] and inflicted significant damage on its infrastructure. NSF personnel are not permitted to bear arms or to move between areas in uniforms ... The NSF, being unarmed, are in no position to confront the militants."
On 2 April 2005, President Abbas dismissed West Bank national security chief General Haj Ismail Jaber. The reason given was a shooting incident on 30 March inside Abbas' headquarters in which militants fired into the air. Abbas also fired Ramallah security chief Yunis al-Has. Abbas placed the security services in Ramallah on a "state of alert". A large-scale reform of the security services followed that month. On 22 April, head of the Gaza Security Forces Moussa Arafat was replaced by Suleiman Heles.
During the year 2007, Fatah and Hamas, two of the main political parties in Palestine, were having confrontations in Gaza. The Fatah deployed the Palestinian Security Forces to confront the Hamas paramilitary forces in Northern Gaza. The confrontation led to the collapse of the Preventive Security Forces headquarters. The surprising Hamas victory led to the withdrawal of Fatah forces from Gaza.
By virtue of a bilateral agreement signed between the Italian Ministry of Defence and Ministry of Interior of the Palestinian Authority, the Carabinieri became a partner in the technical and professional training of Palestinian security forces and, for this reason, on March 19, 2014 Carabinieri instructors left Italy for Jericho, where is situated the General Training Centre.
Before the 2003-2005 reforms, numerous separate security forces, all under exclusive control of President Arafat, existed. The following list of forces (including Intelligence and Civil Police) was published, based on an interview with Gaza Police Commander Nasir Yusuf in early 1995: