Russia has been "completely ignoring" a 30-day unconditional ceasefire proposed by Kyiv and its allies and is attacking "all along" the front line, Ukrainian Foreign Minister Andriy Sybiga said Monday.

Turkey's Foreign Minister Hakan Fidan on Monday urged Russia and Ukraine to come together "as soon as possible" to start a ceasefire agreement ahead of planned talks in Istanbul this week.

"We invite the parties to come together as soon as possible and start the ceasefire," he told a joint press conference in Ankara with his Syrian and Jordanian counterparts

The Kremlin on Monday said "ultimatums" to agree to a ceasefire in Ukraine were "unacceptable" after EU leaders said Moscow had until midnight Monday to agree to a joint proposal with Kyiv for a 30-day halt to the fighting.

The Kremlin said Monday it was focused on "serious" ways to achieve long-term peace with Ukraine, but did not comment on Ukrainian leader Volodymyr Zelensky's invitation for a personal meeting with Vladimir Putin.

Iran and the United States wrapped up nuclear talks in Oman on Sunday with no apparent breakthrough in a public standoff over enrichment, but with both sides confirming plans for future negotiations.

Ukrainian President Volodymyr Zelensky on Sunday urged Russia to accept a 30-day truce proposed by Kyiv's allies, adding he expected Russian President Vladimir Putin to attend peace talks in Turkey.

Iran's Foreign Minister Abbas Araghchi said Sunday he hoped the fourth round of nuclear talks with the United States would reach a "decisive point".

Ukrainian President Volodymyr Zelensky said on Sunday he believed that Moscow had started to consider ending the war in Ukraine but would need to commit to a ceasefire first.

Pakistan and India agreed Saturday to a full and immediate ceasefire after days of deadly jet fighter, missile, drone and artillery attacks -- news surprisingly announced by U.S. President Donald Trump, who congratulated them on using "common sense".

Pakistan on Saturday launched counterattacks against India after three of its air bases were struck overnight, as the conflict between the nuclear-armed neighbors spiraled toward full-blown war.