Mahmoud Abbas has given the Hamas government until the end of the week to accept a manifesto implicitly recognizing
"Before the end of the week, President Abbas will hold a news conference to announce the holding of the referendum and the beginning of the process for carrying it out," said Yasser Abed Rabbo, a Palestine Liberation Organisation (PLO) official.
"We, of the PLO Executive Committee, have approved his move and therefore Hamas has until the end of the week to change its position and accept the ... document."
Hamas, the leading Palestinian Islamist group, has been at loggerheads with Abbas and his Fatah movement, which it defeated in elections in January. The groups have fought each other on the streets.
It rejects the document written by Palestinians, including some of its own resistance fighters, in Israeli jails.
Abbas had set a deadline for Hamas to accept the manifesto on Palestinian statehood by Tuesday. But the extension does not mean that his determination to go ahead with a vote has lessened.
The Palestinian president is well aware that a referendum would also be seen as a confidence vote on the Hamas government, which
Another PLO executive committee member said on Tuesday that there would be no need for a referendum should Hamas accept the blueprint at any stage before polling day.
Rawhi Fattuh, the former parliament speaker, said: "The referendum is not itself a goal. It's a way to break the isolation imposed on the Palestinian people."
Popular support
There is little expectation, however, that Hamas will change its tune, although a new poll indicated that most Palestinians back Abbas's call for a referendum and intend to vote in favor.
A survey released by
Ismail Haniya, who heads the Hamas government, said on Sunday that Abbas was not authorized to call for a referendum under the constitution and that polling the Palestinians so soon after the January elections was unnecessary.
But Haniya appeared cornered on Tuesday with mounting pressure from Abbas and his foreign allies.
Abbas is supported by Western powers that cut aid to the Hamas government, leaving the Palestinian economy in tatters.
Hamas urges talks
Haniya greeted the passing of the deadline with a call for more negotiations.
"We must continue the dialogue as it is the only way to resolve our differences and put an end to the Palestinian crisis," he said shortly after the PLO's decision
"We cannot accept that the dialogue has failed. We cannot decide this after just one or two additional meetings as there are many strategic questions to be addressed."
The president's blueprint calls for a national unity government, an end to attacks in
An official in the office of Ehud Olmert, the prime minister, said that it was an internal Palestinian affair. "Any sign of interference on our behalf could rebound on us and Abu Mazen," he said, using Abbas's nickname.
A popular endorsement of Abbas's blueprint would undercut Hamas's platform of refusing to recognise
It would also bounce Hamas into a coalition government with Fatah.
Sami Abu Zuhri, a Hamas spokesman, earlier called the referendum a "maneuver" to undermine the government's legitimacy.
Hamas's leaders in exile, meanwhile, said they were willing to hold talks with Fatah to end the deadlock after
The invitation came from the Yemeni president, Ali Abdullah Saleh, who supports a negotiated peace deal for the
"We don't know if Fatah has accepted, but Hamas is ready to hold talks in
"We are ready to travel to
Photo caption
President of the Palestinian Authority Mahmoud Abbas