Qatari Prime Minister and Foreign Minister Sheikh Mohammed bin Abdulrahman Al Thani said on Wednesday talks on a Gaza ceasefire and a release of hostages are at a "delicate phase".
"We are trying as much as possible to address this stumbling block," he added, without giving further details.
Qatar's premier condemned what he described as the policy of "collective punishment" still followed by Israel in its war against the enclave's ruling Hamas and the latest escalation in the Israeli-occupied West Bank.
The ceasefire discussions, mediated by Qatar and Egypt, are continuing as a humanitarian crisis devastates Palestinians in Gaza with severe shortages of food, medicine and hospital care.
The war was triggered when Hamas burst into southern Israel from Gaza on October 7, killed 1,200 people and took 253 hostages into the enclave, according to Israeli tallies. Israel has retaliated by pounding Gaza in an air and ground offensive which has killed almost 34,000 Palestinians, according to Gaza health authorities.
The Federal Aviation Administration (FAA) halted traffic on Monday at busy US East Coast airports, snarling more than 1,000 flights after a telecom circuit failed and a backup fibre cable was accidentally cut.
MS NOW, CNN and Politico said on Monday they were suing the Trump Administration to protect their First Amendment rights after President Donald Trump's announcement that he would ban the news outlets from the White House's building grounds.
Pakistan's government said on Monday that it launched airstrikes in the Afghanistan-Pakistan border region, killing at least 28 militants, with one security official saying two Afghan provinces were targeted.
Flights at several British airports were delayed on Monday due to an air traffic control failure, Britain's NATS air traffic control provider said, less than two weeks after a separate issue halted flights across the country.
A fire that broke out at a textile factory in the Chinese city of Foshan in southern Guangdong province on Sunday killed eight people and injured one, state media said on Monday.