A senior Qatari official has said Israel and the Palestinians could trade land rather than conform exactly to their 1967 borders in what appears to be a softening of Arab states' stance on the 2002 peace plan.
Sheikh Hamad bin Jassim al-Thani, Qatar's prime minister and foreign minister, made the comment on Monday after he and a group of Arab officials met US Secretary of State John Kerry to discuss how to promote Israeli-Palestinian peace.
Speaking on behalf of an Arab League delegation, Sheikh Hamad appeared to make a concession to Israel by explicitly raising the possibility of land swaps.
However, it has long been assumed that these would be part of any peace agreement.
"This news is very positive," Tzipi Livni, the Israeli justice minister, told Army Radio on Tuesday.
"In the tumultuous world around ... it could allow the Palestinians to enter the room and make the needed compromises and it sends a message to the Israeli public that this is not just about us and the Palestinians."
Sheikh Hamad bin Jassim al-Thani told reporters the Arab League delegation understood that "peace between the Palestinians and the Israelis is ... a strategic choice for the Arab states".
Kerry has made no secret of his hope to revive peace talks, which broke down in 2010, but it remains unclear whether Barack Obama, the US president, will decide to back a major US effort.
In convening the group, Kerry is trying to ensure that a new peace process would have the backing of the Arab states, who, if they were to offer Israel a comprehensive peace, hold a powerful card that could provide an incentive for Israeli compromises.
"The Arab League delegation affirmed that agreement should be based on the two-state solution on the basis of the 4th of June 1967 line, with the [possibility] of comparable and mutual agreed minor swap of the land," he told reporters after the meeting at the Blair House, the US president's guest house.
Monday's talks included the Bahraini, Egyptian, Jordanian and Qatari foreign ministers as well as officials from Lebanon, Saudi Arabia, the Palestinian Authority and the Arab League.
US Vice President Joe Biden also attended part of the meeting.
The Arab League proposal offered full Arab recognition of Israel if it gave up land seized in a 1967 war and accepted a "just solution" for Palestinian refugees.
Rejected by Israel when it was originally proposed at a Beirut summit in 2002, the plan has major obstacles to overcome.
Israel objects to key points, including a return to 1967 borders, the inclusion of Arab East Jerusalem in a Palestinian state and the return of Palestinian refugees to what is now Israel.
The core issues that need to be settled in the more than six-decade dispute include borders, the fate of Palestinian refugees, the future of Jewish settlements on the West Bank and the status of Jerusalem.