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.
Egyptian President Abdel Fattah al-Sisi received a phone call on Monday from US President Joe Biden to discuss the latest developments in negotiations over a ceasefire in Gaza and the dangers of a military escalation in Rafah, Egypt's presidency said.
A man, armed with a sword, has been arrested in London after he attacked members of the public and two officers near a train station, the British police said on Tuesday.
Australia's food safety agency said on Tuesday it was weighing accusations of contamination about some spice mixes sold by Indian companies MDH and Everest to decide if a food recall was required, becoming the latest regulator to step up scrutiny.
Indonesia's Ruang volcano off the island of Sulawesi erupted on Tuesday, spewing ash and lava, after an eruption earlier this month led to hundreds of evacuations and an airport closure.