Washington and Kiev have held brief talks in Saudi Arabia, a day after hours of US-Russia negotiations on halting the fighting in Ukraine ended without any breakthroughs announced.
"The talks are over. All details will be announced later," a Ukrainian source told a small group of media on Tuesday not long after saying the meeting had begun.
The negotiations between Ukrainian and American officials come after hours of Russian-US meetings that yielded no announcement on any truce.
In Moscow, the Kremlin said the "content" of its talks with the US a day earlier will not be made public, saying it was still "analysing" the results of negotiations with the Americans.
"They are being analysed," Kremlin spokesperson Dmitry Peskov said.
"The content of these talks will definitely not be publicised," he added.
The Kremlin said contacts with Washington would continue but there was no "specific" date for another meeting.
Late on Tuesday, Russian news agencies had reported that Russia and the US plan to release a joint statement on the results of the talks.
There was no sign from Moscow that it would agree to any truce.
Russia and the US held 'challenging but productive' talks on Ukraine, Russian officials say, adding that future discussions will include the UN and other nations as Ukrainian and US delegations continue negotiations in Saudi Arabia.
Sumy attack
Those fresh conversations come as both Russia and Ukraine escalate their attacks on the ground, with Kiev saying its air defence units had downed 78 out of 139 drones launched by Russia on Tuesday.
In Ukraine's northeastern city of Sumy, officials said the toll from a Russian strike a day earlier climbed to 101 wounded, including 23 children.
The strike hit a residential area in the city near the Russian border as negotiations were taking place in Riyadh.
The local administration in Sumy said 14 adults and 16 children were in hospital, with one adult and one child in "serious condition."
Ukraine's Volodymyr Zelenskyy has accused Moscow of wanting to gain a battlefield advantage before agreeing to any ceasefire.
The Kremlin has downplayed expectations of a rapid resolution since rhetoric around a possible halt in fighting escalated with the election of Trump.
A Russian negotiator had said earlier on Tuesday that Moscow would continue "useful" talks with US representatives but would aim to involve the UN and other countries.
'Intense dialogue’
Ukraine has repeatedly accused the Kremlin of trying to put off any serious discussion of implementing a halt in hostilities.
"We talked about everything, it was an intense dialogue, not easy, but very useful for us and the Americans," Grigory Karasin, told the state TASS news agency, adding that "lots of problems were discussed".
"Of course we are far from solving everything, from being in agreement on all points, but it seems that this type of discussion is very timely," he said.
"We will continue doing it, adding in the international community, above all the United Nations and certain countries," Karasin said.
He spoke a day after the US and Russian teams held 12 hours of talks in a luxury hotel in Saudi Arabia.
At a previous round of talks this month in Jeddah - days after Ukrainian President Volodymyr Zelenskyy's dressing-down by Trump at the White House - Kiev agreed to a US-proposed 30-day ceasefire that was subsequently rejected by Russian President Vladimir Putin.
Officials are now studying a possible resumption of the Black Sea Initiative, an agreement that allowed millions of tonnes of grain and other food exports to be shipped from Ukraine's ports.
