A former ally of deposed Ukrainian president Viktor Yanukovych has been found shot to death in his home in Kiev.

The Ukrainian interior ministry said Oleg Kalashnikov, a former member of the Ukrainian parliament, was found dead Wednesday evening. It said he had died of gunshot wounds but did not say whether it was believed to be homicide or suicide.

Kalashnikov was a deputy for the Party of Regions in Ukraine’s previous parliament.

At least six former Ukrainian government officials from Yanukovych’s time have died over the past two months in various circumstances that police have said were most likely suicides.

Kalashnikov had taken part in protests in support of the pro-Moscow leader Yanukovych, who was ousted in 2014 after three months of mass demonstrations calling for his removal ended in a bloodbath.

Yanukovych fled to Russia, triggering Ukraine’s descent into conflict which has seen the annexation of the Crimea region by Russia and ongoing fighting in the east with pro-Moscow rebels, despite a February ceasefire.