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.
Israel's military kept up its assault on Gaza City and the wider Gaza Strip on Saturday, dismantling underground shafts and booby-trapped structures in attacks that left 34 Palestinians dead, according to Gazan health authorities.
World leaders gather in New York this coming week for a UN General Assembly dominated by US President Donald Trump's return to the rostrum, war in Gaza and Ukraine, rising Western recognition of Palestinian statehood and nuclear tensions with Iran.
Russia launched a major drone and missile attack on Ukraine overnight, killing three people and injuring dozens, President Volodymyr Zelenskyy said on Saturday.
The UN Security Council voted on Friday to restore sweeping economic sanctions on Iran in response to renewed concerns over its nuclear activities, a move that drew sharp condemnation from Tehran.
The bodies of 19 people were recovered after the rubber migrant boat they were in sank off the eastern Libyan coast, the International Organisation for Migration (IOM) said on Friday.