An undercover Israeli policeman dressed as a Palestinian woman opens a car door after detaining a Palestinian protester during clashes in Shuafat refugee camp, in the West Bank near Jerusalem May 15, 2011. Israeli security forces had been on alert for violence on Sunday, the day Palestinians mourn the "Nakba", or catastrophe, of Israel's founding in a 1948 war, when hundreds of thousands of their brethren fled or were forced to leave their homes. REUTERS/Baz Ratner (WEST BANK - Tags: POLITICS CIVIL UNREST ANNIVERSARY) 

An undercover Israeli policeman dressed as a Palestinian woman opens a car door after detaining a Palestinian protester during clashes in Shuafat refugee camp, in the West Bank near Jerusalem May 15, 2011. Israeli security forces had been on alert for violence on Sunday, the day Palestinians mourn the "Nakba", or catastrophe, of Israel's founding in a 1948 war, when hundreds of thousands of their brethren fled or were forced to leave their homes. REUTERS/Baz Ratner (WEST BANK - Tags: POLITICS CIVIL UNREST ANNIVERSARY) 

An undercover Israeli policeman dressed as a Palestinian woman opens a car door after detaining a Palestinian protester during clashes in Shuafat refugee camp, in the West Bank near Jerusalem May 15, 2011. Israeli security forces had been on alert for violence on Sunday, the day Palestinians mourn the "Nakba", or catastrophe, of Israel's founding in a 1948 war, when hundreds of thousands of their brethren fled or were forced to leave their homes. REUTERS/Baz Ratner (WEST BANK - Tags: POLITICS CIVIL UNREST ANNIVERSARY) 

An undercover Israeli policeman dressed as a Palestinian woman opens a car door after detaining a Palestinian protester during clashes in Shuafat refugee camp, in the West Bank near Jerusalem May 15, 2011. Israeli security forces had been on alert for violence on Sunday, the day Palestinians mourn the "Nakba", or catastrophe, of Israel's founding in a 1948 war, when hundreds of thousands of their brethren fled or were forced to leave their homes. REUTERS/Baz Ratner (WEST BANK - Tags: POLITICS CIVIL UNREST ANNIVERSARY) 

Undercover Israeli police officers detain a Palestinian suspected of throwing stones during clashes in the East Jerusalem neighbourhood of Issawiya May 15, 2011. Israeli security forces had been on alert for violence on Sunday, the day Palestinians mark the "Nakba", or catastrophe, to commemorate the expulsion or fleeing of some 700, 000 Palestinians from their homes in the war that led to the founding of Israel in 1948. REUTERS/Baz Ratner (JERUSALEM - Tags: POLITICS CIVIL UNREST ANNIVERSARY) 

Undercover Israeli policemen together with policemen detain a Palestinian during clashes in the East Jerusalem neighbourhood of Issawiya May 13, 2011. The police are on high alert ahead of "Nakba Day" (Catastrophe), marked on May 15 to commemorate the expulsion or fleeing of hundreds of thousands of Palestinians from their homes in the war that led to the founding of Israel in 1948. REUTERS/Ammar Awad (JERUSALEM - Tags: POLITICS CIVIL UNREST) 

An undercover Israeli police officer restrains a protester (front) that was throwing stones during clashes in Umm el-Fahm October 27, 2010. Israeli police on Wednesday fired tear gas and stun grenades to disperse Arabs who were protesting against a rally by ultranationalist Jews in the Israeli-Arab city. Riot police charged about 200 Arabs who threw stones at them before retreating, police spokesman Micky Rosenfeld said. REUTERS/Ammar Awad (ISRAEL - Tags: CIVIL UNREST POLITICS) 

Undercover Israeli police officers detain a protester (front) during clashes in Umm el-Fahm October 27, 2010. Israeli police on Wednesday fired tear gas and stun grenades to disperse Arabs who were protesting against a rally by ultranationalist Jews in the Israeli-Arab city. Riot police charged about 200 Arabs who threw stones at them before retreating, police spokesman Micky Rosenfeld said. REUTERS/Nir Elias (ISRAEL - Tags: CIVIL UNREST POLITICS) 

Undercover Israeli police officers restrain protesters that were throwing stones during clashes in Umm el-Fahm October 27, 2010. Israeli police on Wednesday fired tear gas and stun grenades to disperse Arabs who were protesting against a rally by ultranationalist Jews in the Israeli-Arab city. Riot police charged about 200 Arabs who threw stones at them before retreating, police spokesman Micky Rosenfeld said. REUTERS/Ammar Awad (ISRAEL - Tags: CIVIL UNREST POLITICS IMAGES OF THE DAY) 

An undercover Israeli police officer holds a weapon as another detains a Palestinian suspected of throwing stones during clashes in the East Jerusalem neighbourhood of Wadi al-Joz March 16, 2010. Palestinians mounted violent protests in a "day of rage" in Jerusalem on Tuesday and a U.S.-Israeli crisis over a Jewish settlement project deepened with the cancellation of a U.S. peace envoy's visit. REUTERS/Baz Ratner (JERUSALEM - Tags: POLITICS CIVIL UNREST) 

An undercover Israeli police officer detains a Palestinian suspected of throwing stones during clashes in the East Jerusalem neighbourhood of Wadi al-Joz March 16, 2010. Palestinians mounted violent protests in a "day of rage" in Jerusalem on Tuesday and a U.S.-Israeli crisis over a Jewish settlement project deepened with the cancellation of a U.S. peace envoy's visit. REUTERS/Baz Ratner (JERUSALEM - Tags: POLITICS CIVIL UNREST) 

Undercover Israeli police officers detain Palestinians suspected of throwing stones during clashes in the East Jerusalem neighbourhood of Wadi al-Joz March 16, 2010. Palestinians mounted violent protests in a "day of rage" in Jerusalem on Tuesday and a U.S.-Israeli crisis over a Jewish settlement project deepened with the cancellation of a U.S. peace envoy's visit. REUTERS/Baz Ratner (JERUSALEM - Tags: POLITICS CIVIL UNREST) 

An undercover Israeli police officer (R) scuffles with a Palestinian youth suspected of throwing stones while trying to detain him during clashes in the Shuafat refugee camp in the West Bank near Jerusalem February 9, 2010. Clashes erupted between Palestinian stone-throwers and Israeli police that entered the refugee camp, a Reuters witness said on Tuesday. REUTERS/Ammar Awad (WEST BANK - Tags: POLITICS CIVIL UNREST) 

An undercover Israeli police officer holds a weapon as others detain a Palestinian suspected of throwing stones during clashes in the East Jerusalem neighbourhood of Wadi al-Joz March 16, 2010. Palestinians mounted violent protests in a "day of rage" in Jerusalem on Tuesday and a U.S.-Israeli crisis over a Jewish settlement project deepened with the cancellation of a U.S. peace envoy's visit. REUTERS/Baz Ratner (JERUSALEM - Tags: POLITICS CIVIL UNREST IMAGES OF THE DAY) 

Undercover Israeli police officers scuffle with a Palestinian as his son is being detained during clashes in the East Jerusalem neighbourhood of Ras al-Amud October 9, 2009. Palestinian leaders on Thursday called for a general strike over disputed Jerusalem and warned of further protests on the Muslim day of Friday prayers at al-Aqsa mosque. Israel says it is not taking seriously recent Palestinian warnings that a general uprising is about to break out. REUTERS/Baz Ratner (JERUSALEM POLITICS CONFLICT) 

Members of an undercover Israeli force detain Palestinian youths during a protest in Arab East Jerusalem against Israel's offensive in Gaza March 3, 2008. Israeli troops pulled out of the Gaza Strip on Monday after a U.S. appeal to end days of fighting that killed more than 100 Palestinians and rescue peace talks. REUTERS/Ammar Awad (JERUSALEM) 

Members of an undercover Israeli force detain Palestinian youths during a protest in Arab East Jerusalem, against Israel's offensive in Gaza, March 3, 2008. Israeli troops pulled out of the Gaza Strip on Monday after a U.S. appeal to end days of fighting that killed more than 100 Palestinians and rescue peace talks. REUTERS/Ammar Awad (JERUSALEM) 

A member of an undercover Israeli force detains a Palestinian during a protest in Arab East Jerusalem against Israel's offensive in Gaza March 3, 2008. Israeli troops pulled out of the Gaza Strip on Monday after a U.S. appeal to end days of fighting that killed more than 100 Palestinians and rescue peace talks. REUTERS/Ammar Awad (JERUSALEM) 

A Palestinian demonstrator is arrested by Israeli undercover border guards during a demonstration in the West Bank. A Palestinian demonstrator (C) is arrested by Israeli undercover border guards during a demonstration against Israel's "separation" barrier in the West Bank village of Bilin April 28, 2005. REUTERS/Ammar Awad 

A Palestinian demonstrator is arrested by Israeli undercover border guards during a demonstration against Israel's "separation" barrier in the West Bank village of Bilin April 28, 2005. REUTERS/Mahfouz Abu Turk AJ/CCK/JV 

An undercover Israeli policeman arrests a Palestinian demostrator during clashes in Jerusalem's Old City December 22, 2000. U.S.-mediated peace talks between Israel and Palestinians are in crisis. Negotiators trying to halt 12 weeks of violence at a secluded airbase in Washington almost came to blows, a senior Palestinian official said on Friday.
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An undercover Israeli soldier grabs a Palestinian and threatens him with a pistol as he arrests the man for throwing stones at the Jewish settlement in Hebron town center July 3. About six Palestinians were arrested in the attempt by Israel to put a stop to the daily violent clashes that have left dozens of Palestinians and some Israeli soldiers wounded. 

Undercover Israeli soldiers, some of them masked, run through the Hebron market back to the Jewish settlement in the town centre after an operation to detain Palestinian stone-throwers, July 3. About six Palestinians were arrested in an attempt by Israel to put a stop to the daily violent clashes that have left dozens of Palestinians and some Israeli soldiers wounded.

MIDEAST UNREST