Russian authorities have opened a murder investigation after the daughter of an ultra-nationalist Russian ideologue - who advocates a new Russian empire - was killed in a suspected car bomb attack outside Moscow.
Its foreign ministry pointed to the possibility of "the policy of state terrorism implemented by the Kyiv regime", something Ukraine has strongly denied, saying that any such action would only be carried out by a "criminal state".
Darya Dugina is the daughter of Alexander Dugin, whose car she was driving, and who has been sanctioned by the US for his extreme views, which include supporting the annexation of Ukraine.
She was killed after a suspected explosive device detonated on the Toyota Land Cruiser, investigators from the Moscow region said in a statement.
Russia's TASS state news agency quoted Andrei Krasnov, someone who knew Ms Dugina, as saying the vehicle belonged to her father and claiming that he was probably the intended target.
Father and daughter had been attending a festival outside Moscow and Dugin had decided to switch cars at the last minute, Russian government newspaper Rossiiskaya Gazeta reported.
TV footage showed investigators collecting debris and fragments from the spot where the explosion happened. Mr Dugin, who is 60, was pictured holding his head in his hands as he watched the burning wreckage of the vehicle.
Darya was reported by Russian state media to have been 30 years old.
Investigators, who described Darya Dugina as a journalist and political expert, said they would be carrying out forensic examinations to try to determine exactly what had happened.
They said they were considering "all versions" when it came to working out who was responsible for the crime.
"If the Ukrainian trace is confirmed... then we should talk about the policy of state terrorism implemented by the Kyiv regime," a spokeswoman for the Russian Foreign Ministry said in a Telegram post.
"There have been plenty of facts accumulated over the years: from political calls for violence, to the leadership and participation of Ukrainian state structures in crimes," Maria Zakharova claimed.
"I confirm that Ukraine, of course, had nothing to do with this because we are not a criminal state, like the Russian Federation, and moreover we are not a terrorist state," Mykhailo Podolyak, an advisor to the Ukrainian president, said.
Alexander Dugin has long advocated the unification of Russian-speaking and other territories in a vast new Russian empire.
He wants that empire to include Ukraine, where Russian forces are currently carrying out what Moscow calls a "special military operation" to demilitarise the country.
The influence of Mr Dugin, who is on a US sanctions list, over Russian President Vladimir Putin has been a subject for speculation, with some Russia watchers asserting that his sway is significant, while others insist that it is minimal. He has no official role in the Kremlin.
In a statement in March, the US Treasury said Mr Dugin, the chief editor of the United World International website, which has suggested Ukraine would "perish" if admitted to the NATO military alliance, had been put on its sanctions list.
Darya Dugina, who also went by the surname Platonova, broadly supported her father's ideas and appeared on state TV in her own right to offer support for Russia's actions in Ukraine.
