Bulgarian PM Kiril Petkov, President Rumen Radev and other officials went into quarantine on Tuesday after being in contact with the parliamentary speaker, who tested positive for COVID-19.

Bulgaria has the lowest vaccination rate in the European Union, with experts blaming low trust in the authorities and widespread conspiracy theories.

"Prime Minister Kiril Petkov is self-isolating ... he continues to work remotely," the government press service said. Radev's office also said the president and members of his administration were isolating but added they were "all in good health."