A man threw an incendiary mixture at one of the polling stations at 10:50 in town of Borzna, Chernihiv region, the Interior Ministry of Ukraine reported, adding that no one was injured as a result of the incident.

"Chernihiv region: at 10:50 in Borzna, a man threw a flammable substance that ignited at one of the polling stations located on 105 Panteleimon Kulish Street. At 10:51 the fire was extinguished. No one was injured as a result of the incident. The electoral process was not stopped," the Interior Ministry said on Twitter.

The first round of Ukraine's presidential election is taking place on Sunday. The polling stations will close at 8:00 p.m. A record-large number of candidates - 39 - are running in the presidential election.