The police are investigating a recent explosion at a shop of the Roshen confectionary holding in Kyiv as an act of hooliganism, a spokesman for the Ukrainian Interior Ministry's branch for the city has said.

"The preliminary information available indicates that an unknown explosive device was detonated there," the spokesman said.

The Roshen company, owned by Ukrainian President Petro Poroshenko, opened 14 new stores in Kyiv in 2014 alone.