Russian President Vladimir Putin said on Saturday that an African initiative could be a basis for peace in Ukraine but that Ukrainian attacks made it hard to realise.
He was speaking at a press conference after meeting African leaders in St Petersburg on Friday and hearing their calls for Moscow to move ahead with their plan.
"There are provisions of this peace initiative that are being implemented," he said. "But there are things that are difficult or impossible to implement."
Reuters reported in June that African mediation in the conflict could begin with confidence-building measures followed by a cessation of hostilities agreement accompanied by negotiations between Russia and the West.
Putin said that one of the points in the initiative was a ceasefire. "But the Ukrainian army is on the offensive, they are attacking, they are implementing a large-scale strategic offensive operation... We cannot cease fire when we are under attack."
On the question of starting peace talks, he said, "We did not reject them... In order for this process to begin, there needs to be agreement on both sides."
Ukrainian President Volodymyr Zelenskiy has rejected the idea of a ceasefire now that would leave Russia in control of nearly a fifth of his country and give its forces time to regroup after 17 grinding months of war.
Russian missiles have struck the Ukrainian capital Kyiv and the surrounding region early on Sunday, killing at least one person and wounding 13 others as fires broke out across the city, officials said.
The US military has completed its eighth consecutive night of strikes against Iran, the Central Command (CENTCOM) said on Saturday, hitting Iranian military coastal surveillance and air defence facilities.
A Lebanese soldier was killed, and an officer and another soldier were wounded when a suspicious object exploded in an army vehicle in the southern Lebanese town of Mansouri, the Lebanese army said on Saturday.
The Kuwaiti Fire Force has announced that fire crews succeeded in controlling two fires that broke out in separate locations across the country due to Iranian attacks, with one site injuring several firefighters and an oil sector worker.
Two US military personnel in Jordan have been killed on Friday as they defended against Iranian missiles and drones, with another member missing, the Central Command (CENTCOM) said in a statement on Saturday.