MOSCOW (REUTERS) - Russia's Federal Security Service (FSB) on Monday (Aug 22) accused Ukraine's secret services of carrying out the weekend murder of Darya Dugina, the daughter of an ultra-nationalist Russian ideologue, Russian news agencies reported.

Ms Dugina, daughter of prominent ideologue Alexander Dugin, was killed on Saturday evening when a suspected explosive device blew up the Toyota Land Cruiser she was driving, Russian investigators said.

Ukraine has denied involvement.

The FSB said the attack was carried out by a Ukrainian woman born in 1979 whom it named.

It said the woman and her teenage daughter had arrived in Russia in July and spent a month preparing the attack by renting an apartment in the same housing block and researching Ms Dugina's lifestyle, according to an FSB statement carried by Russian news agencies.

The assailant had attended an event outside Moscow on Saturday evening which Ms Dugina and her father were also at, before carrying out a "controlled explosion" of Ms Dugina's car, and fleeing Russia to Estonia, the FSB was quoted as saying.

There was no immediate response from Kyiv to the FSB statement.

Mr Dugin is an ultra-nationalist ideologue who has advocated violence to achieve the unification of Russian-speaking and other territories in a vast new Russian empire. 

Ms Dugina, who appeared regularly on Russian state TV, broadly endorsed her father’s ideas and was a supporter of what Russia calls its “special military operation” in Ukraine, which Kyiv and the West cast as an imperial-style war of conquest. 

Wednesday will mark six months since Russian troops crossed the border into Ukraine.

Mr Dugin’s influence in Russia and proximity to President Vladimir Putin has been the subject of speculation.

Some Russia watchers ascribe him significant sway over Moscow’s foreign policy and say he helped lay the intellectual groundwork for Mr Putin to adopt a more aggressive and expansionist foreign policy. 

Others have said his impact and influence are minimal. The 60-year-old has never held an official Kremlin role. 

Mr Dugin did not respond to questions emailed to him on Sunday at an address listed on the website of the International Eurasian Movement that he founded.