Russian diplomatic missions to Ukraine will enjoy regular protection on the State Duma elections day, Ukrainian Prime Minister Volodymyr Groysman has said.

"Ukraine is a highly civilized country, and we will act consistent with the international law. We will not protect Russia's electoral process. In fact, Kyiv maintains the order irrespective of the day of the week. Hence, the law enforcement system will execute its functions in a regular regime," he told the press in Kyiv on Saturday.

The Russian Embassy in Ukraine said earlier on the day that a group of unknown persons hurled a smoke grenade into the embassy premises and used a salute launcher early in the morning.