Negotiators seeking a Gaza ceasefire met for a second day in Qatar on Friday, while top European diplomats were in Israel to stress the urgency of averting a wider war.

The on-and-off truce talks reconvened in Qatar's capital on Thursday without Hamas, which has accused Israel of obstructing a deal and insists on the implementation of previously agreed terms.

Months of talks have yet to secure the return of hostages held by militants in Gaza or staunch the spiraling death toll, which authorities in Hamas-ruled Gaza on Thursday said had topped 40,000 in the Palestinian territory after more than 10 months of war.

US National Security Council spokesman John Kirby said the talks had "a promising start" but acknowledged "there remains a lot of work to do, as Israel's main military supplier the United States has been mediating the talks with Qatar and Egypt.

Reports have it that the United States and its allies see the proposed Gaza truce as key to de-escalating soaring regional tensions, particularly with Iran.

In the same vein, British Foreign Secretary David Lamy said ahead of his visit with French Foreign Minister Stephane Sejourne that it was a dangerous moment for the Middle East. 

According to Britain's foreign ministry, during meetings with Israel's Foreign Minister Israel Katz and Minister of Strategic Affairs Ron Dermer, they stressed that there was no time for delays or excuses from all parties on a ceasefire deal in Gaza. 

Sejourne said, "Any miscalculation in the current situation could provoke a generalised conflagration.

With talks taking place in the Gulf emirate, bombs have been reported to continue to fall in Gaza.