The Burgas District Prosecutor's Office continues the investigation into the incident with the passenger bus near Malko Tarnovo, in which two women died and nine other people were injured.
It is expected to become clear whether charges will be brought against the two drivers or whether they will be released. They have been detained for 24 hours. Their alcohol and drug tests are negative.
The tragedy occurred after a passenger bus drove in reverse and overturned into a ravine.
The bus was carrying the two drivers, a tour guide and 36 passengers, mostly women and children from Ukraine, who had set off on a trip from Odessa to Istanbul. Contact is being maintained with the Ukrainian embassy and the company that organized the trip so that some of the passengers can return home.