A third charge has been filed against a Ukrainian military officer who has been behind bars in Moscow for nearly a year over the deaths of two Russian journalists in Ukraine.

Nadezhda Savchenko, who worked as a spotter for Ukrainian troops fighting separatist rebels in eastern Ukraine, had been charged with providing information that led to the journalists' deaths in a mortar attack. She has been in custody in Russia since June after allegedly entering Russia illegally, for which she also has been charged.

On Thursday, at the conclusion of the preliminary proceedings against her, defense lawyer Mark Feygin said she has also been charged with attempted murder, in connection with five people who were wounded in the mortar attack.