It is hoped Mrs Clinton will at least call on both governments to tone down the rhetoric and hold peace talks.

BBC: Azeri-Armenian clashes 'may escalate' - Hillary Clinton

Also on Sunday, the government restated its offer to hold peace talks with the rebels - a day after they issued a similar statement.

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Israel has refused to hold peace talks with the autocratic but less ideological Syrian president, Bashar Assad, unless he first renounces ties to Israel's arch-enemies, Iran and Hizbullah.

ECONOMIST: Fenced in | The

Similarly Mr Obama made progress in encouraging Israeli and Palestinian leaders to hold talks about peace earlier this year, but as he is distracted by other concerns both parties have since drifted away from negotiations.

ECONOMIST: Barack Obama and the Nobel peace prize

The 72-year-old Reverend Ian Paisley, the leader of the one big political party to refuse to take part in peace talks, continues to hold many would-be moderates in check.

ECONOMIST: Why peace is now possible

The government said it would not hold talks with the ELN unless if showed "acts of peace" rather than words.

BBC: Uwe Breuer (l) at Aguas Claras airport in Colombia

Israeli Foreign Minister Shimon Peres urged Arafat to "take hold" of the situation, warning all the recent movement toward resuming peace talks could be lost if he does not.

CNN: Palestinians reject Israeli ultimatum

London (CNN) -- Six Nobel Peace Prize laureates have urged Britain's Prime Minister David Cameron to hold talks with Argentina on the future of the Falkland Islands.

CNN: STORY HIGHLIGHTS