GAZA CITY, Gaza Strip (AP) — Hamas has signed a pledge to back any Palestinian bid to join the International Criminal Court, two senior officials in the group said Saturday. Such a step could expose Israel — as well as Hamas — to war crimes investigations.

Palestinian President Mahmoud Abbas has debated for months whether to join the court, a step that would transform his relations with Israel from tense to openly hostile.

Last month, Abbas obtained written pledges of support from his Fatah movement and other factions in the Palestine Liberation Organization, and said he would also seek the formal backing of Hamas, his main political rival.

Hamas said for several weeks that it was studying the idea.

Palestinian protesters run away from Israeli soldiers during clashes, following a demonstration against the Israeli military action in Gaza, in the West
Palestinian protesters run away from Israeli soldiers during clashes, following a demonstration against the Israeli military action in Gaza, in the West Bank city of Nablus on Friday, Aug. 22, 2014. (AP Photo/Nasser Ishtayeh) (Nasser Ishtayeh/AP)

If Abbas were to turn to the court, Hamas could be investigated for its indiscriminate rocket fire at Israel for more than a decade, while Israel could come under scrutiny for its actions in the current Gaza war as well as its settlement building on war-won lands.

On Thursday and Friday, Abbas held meetings in Qatar with the top Hamas leader in exile, Khaled Mashaal.

Early Saturday, a senior Hamas leader, Moussa Abu Marzouk, wrote on his Facebook page that "Hamas has signed the paper" of support Abbas had requested. Another Hamas official, Izzat Rishq, confirmed the document was signed. Abu Marzouk's post was reported on Hamas news websites.

Abu Marzouk and Rishq did not explain Hamas' reasons for agreeing to support a Palestinian membership bid.


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There was no comment from Abbas aides and no immediate reaction from Israel, which has opposed involving the court.

Turning to the International Criminal Court became an option for Abbas in 2012, after the U.N. General Assembly recognized "Palestine" in the West Bank, Gaza and east Jerusalem, lands captured by Israel in 1967, as a non-member observer state. The upgrade to a state opened the door to requesting the court's jurisdiction in Palestine.


A Palestinian protester uses a slingshot to shoot a stone towards Israeli soldiers during clashes, following a demonstration against the Israeli military
A Palestinian protester uses a slingshot to shoot a stone towards Israeli soldiers during clashes, following a demonstration against the Israeli military action in Gaza, in the West Bank city of Nablus on Friday, Aug. 22, 2014. (AP Photo/Nasser Ishtayeh) (Nasser Ishtayeh/AP)

One of the Palestinian protesters prepares to throw a stone as they face Israeli soldiers to protest against the Israeli military action in Gaza, during
One of the Palestinian protesters prepares to throw a stone as they face Israeli soldiers to protest against the Israeli military action in Gaza, during clashes in the West Bank city of Nablus on Friday, Aug. 22, 2014. (AP Photo/Nasser Ishtayeh) (Nasser Ishtayeh/AP)


Palestinian protesters face Israeli soldiers during clashes, following a protest against the Israeli military action in Gaza, in the West Bank city of
Palestinian protesters face Israeli soldiers during clashes, following a protest against the Israeli military action in Gaza, in the West Bank city of Nablus on Friday, Aug. 22, 2014. (AP Photo/Nasser Ishtayeh) (Nasser Ishtayeh/AP)