Last month, Bulgaria ordered the expulsion of 70 Russian diplomatic staff from Bulgaria, exacerbating tensions between the two historically close nations.
Petkov, who took a strong stance against Russia after it invaded Ukraine on Feb. 24, has claimed Moscow used “hybrid war” tactics to bring down his government.
In April, Russia cut off gas supplies to Bulgaria after officials refused a Moscow demand to pay gas bills in rubles, Russia’s currency.
Bulgaria’s defense minister was ousted in early March for referring to Russia’s war as a “special military operation,” the Kremlin-preferred description.
One of Petkov’s main goals was to halt Moscow’s almost total energy grip by diversifying sources of supplies.
In one of his last moves as prime minister, Petkov on Wednesday discussed with experts from U.S. company Westinghouse possibilities to receive nuclear fuel for one of its two Russian-designed reactors.
“I am concerned about what is happening in Europe and my forecast is that the war (in Ukraine) will continue for five more years, which is why I hope we will manage to continue (on) our path to diversification,” Petkov said.
Political analysts expect that the new vote, likely to be held in October, could again produce a fragmented parliament, and deepen the political impasse that has gripped the EU’s poorest member for months.
The country's president must now dissolve parliament, appoint a caretaker government, and set a date for Bulgaria’s fourth parliamentary vote since April 2021.