Bulgarian PM Boiko Borisov will step down as Bulgarian prime minister. His resignation was prompted by the victory of Socialist-backed general Rumen Radev in the presidential election, DW reported.

Following the defeat of his center-right party's candidate in Bulgaria's presidential election on Sunday, Prime Minister Boiko Borisov has said he will resign as promised.

Tsetska Tsacheva, the 58-year-old candidate of the ruling center-right GERB party and Borisov's choice, was left behind with 36.2 percent with 99.3 percent of polling stations counted.