Ukrainian president Volodymyr Zelensky and US president-elect Donald Trump could meet this weekend in Paris, where both leaders are to attend the re-opening of Notre Dame cathedral, according to Ukrainian officials.
This would be the first meeting between the two since the election of Mr Trump, who has claimed he will secure a ceasefire within 24 hours in the Russia-Ukraine war.
His comments have raised fears he would push Ukraine into accepting peace on Russia's terms.
"The president of Ukraine will attend the celebrations on the occasion of the restoration of the cathedral of Notre Dame. He will meet with President (Emmanuel) Macron," a source in the Ukrainian government said.
Diplomatic sources in Paris also said Mr Zelensky was expected to attend.
The Ukrainian source said "other meetings are also possible, in particular with president-elect Donald Trump, who will also attend the event."
Mr Trump has repeatedly criticised US military aid to Kyiv, in contrast to incumbent president Joe Biden.
Fears over his approach increased after he named Keith Kellogg, a retired general who has called on Kyiv to make concessions to end the war, as his Ukraine envoy.
Ukrainian officials have sought to project calm and fostered relations with the incoming president and his team.
Last month, Mr Zelensky said that Russia's war against his country will "end sooner" than it otherwise would have done once Mr Trump becomes president.
Ukraine shows off new 'rocket-drone' in bid to boost long-range strikes
Meanwhile, Ukraine has showed off a new locally-produced "rocket-drone" which it said could fly 700km - more than twice the longest range attributed to missiles supplied by Western allies.
The unmanned craft, called "Peklo" - which means 'hell' in Ukrainian - is the second such "rocket drone" unveiled by Kyiv as it tries to increase its ability to strike deep into Russia, which invaded 33 months ago.
The drones could reach speeds of 700km/h, a representative from Ukraine's state arms manufacturer Ukroboronprom told reporters at a ceremony where they were officially handed over to the armed forces.
No other details were provided and no evidence was given of the drone's range or speed. Ukraine has released few details of its arms industry, citing concerns about giving useful information to Moscow.
Ukraine's arms production minister told Reuters in November the "rocket-drone" could be viewed as something akin to a cruise missile, which flies low on a guided path to its target, usually below the speed of sound.
The drones were more than a metre-long, with small wings on either side and two tail fins. US-supplied ATACMS missiles have a declared range of just over 300km.
Russia has used thousands of long-range missiles and drones to hit military and infrastructure targets all over Ukraine.
Ukraine has sought the ability to strike back, but its allies until last month resisted calls to allow use of their missiles on targets deep inside Russia.
Ukraine has sought to balance the long-range strike gap throughout the war by launching explosive-laden propeller drones at targets up to 1,000km inside Russia.
Read more: Latest Ukraine stories
Ukrainian drones strike Russian-occupied town of Oleshky
Meanwhile, Ukrainian drones have struck the Russian-occupied town of Oleshky, killing three people and seriously wounding three others, the region's Moscow-appointed governor said.
Images shared by Vladimir Saldo, the Russian-installed governor of Ukraine's southern Kherson region, showed what appeared to be bodies lying on a street and outside a building, covered with blankets.
"This morning, Alyoshki was subjected to an inhumane kamikaze drone attack," Mr Saldo said, using the Russian spelling of the town's name.
He said the drones targeted an aid distribution point in the town, accusing Kyiv of directing the attack "exclusively at the civilian population".
"As a result ... three people were killed. Three more citizens were seriously injured," he said.
Kyiv did not immediately comment but denies targeting civilians in Russian-occupied areas of the country.
Oleshky had a population of about 20,000 people before Moscow launched its military assault on Ukraine in February 2022.
It lies on the Russian-occupied eastern bank of the Dnipro river.
The river acts as a de facto front line between Moscow's and Kyiv's forces, with both sides regularly accusing each other of firing artillery and drones across the vast waterway.
