Russia's security service on Monday accused Ukraine's secret services of killing Darya Dugina, the daughter of a Russian ultranationalist, Russian news agencies reported.

Dugina, whose father is 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 Federal Security Service (FSB) said the attack was carried out by a Ukrainian woman born in 1979, whom it named.