In under two years, Bulgaria has become one of the world's most battery-intensive energy markets, raising questions about its grid and the future of conventional power generation.
Twenty-seven presidential and vice-presidential tickets have registered for Bulgaria's October 25 election.
The featherweight boxer will return from Bulgaria with a bronze medal after losing her semi-final bout.
A report from Ukrinform (Ukraine) sets out the main available details, with claims kept attributed to their sources.
The Dutch broadcaster sat out this year's Eurovision Song Contest but has confirmed it will compete again when the event is held in Bulgaria.
Pakistan's Deputy PM and Foreign Minister Ishaq Dar met Bulgaria's Foreign Minister on the UN sidelines, agreeing to strengthen bilateral ties.
Great Britain has secured at least three medals at the European Boxing Championships in Bulgaria after Chantelle Reid, Damar Thomas and Abdul Burton all advanced to the semi-finals.
The interior minister said new measures aim to prevent similar incidents, according to Anadolu Agency.
Officials are not ruling out outside interference in the blaze, according to the BBC.