Ukraine has agreed to accept an immediate 30-day ceasefire in the conflict with Russia during talks with US officials in Saudi Arabia, the countries said in a joint statement.

US Secretary of State Marco Rubio said he would now take the offer to the Russian side.

"We're going to tell them this is what's on the table. Ukraine is ready to stop shooting and start talking. And now it'll be up to them to say yes or no," Rubio said.

Officials confirmed that the United States will resume sharing intelligence with Ukraine.

US President Donald Trump said he hoped for a swift ceasefire.

"I hope it'll be over the next few days," he told reporters.

Trump said he would invite Ukrainian President Volodymyr Zelenskyy back to the White House and that he will talk to Russian President Vladimir Putin about the ceasefire this week.

Putin has said he is open to discussing a peace deal. But he has ruled out territorial concessions and said Ukraine must withdraw fully from four Ukrainian regions claimed and partly controlled by Russia.

Zelenskyy, who was also in Saudi Arabia but did not participate in the talks, said the ceasefire was a "positive proposal" that covers the frontline in the conflict, not just fighting by air and sea.

The Ukrainian leader said the ceasefire would take effect as soon as Russia agreed.

"When the agreements come into force, during these 30 days of 'silence,' we will have time to prepare with our partners at the level of working documents all the aspects for reliable peace and long-term security," Zelenskiy said.

Ukrainian and US officials met behind closed doors for hours to find a path towards ending the war with Russia after Ukrainian forces launched their largest drone attack on Moscow of the war overnight.

In Tuesday's joint statement, the two countries said they agreed to conclude a comprehensive agreement for developing Ukraine's critical mineral resources as soon as possible. The agreement had been in the works but was thrown into limbo by that meeting.

With AAP.