Volen Siderov, a controversial Bulgarian far-right presidential candidate, cast his vote on Sunday in Sofia, expressing his worries that massive forgeries could be carried out by the ruling centrist-right GERB.

"Today, GERB will receive a massive slap in the face by the Bulgarian nation," the controversial leader of the nationalist Ataka  (Attack) party declared in his trademark style.

According to Siderov, GERB has spent over BGN 50 M in order to "buy" the elections and impose an "unsubstantial figure" for president. He referred to Rosen Plevneliev, the country's former Regional Development Minister, who is endorsed by GERB.

The far-right leader added he believed that massive forgeries will take place during the ballot counting process across the country. The elections will be corrupted by the ruling party, as well as its "partners", the oppositional left-wing Bulgarian Socialist Party and the ethnic Turkish Movement for Rights and Freedoms, Siderov stated.

Volen Siderov is widely regarded as an outsider for Sunday's presidential elections, with no polling agencies giving him any chances of reaching the second round.