Investigators detained two transportation officials on Tuesday over the sinking of the Bulgaria riverboat that killed 122 people last month in the country's worst river disaster in decades.
The Kazan-based officials, Irek Timergazeyev and Vladislav Semyonov, permitted the company that operated the boat to carry out its business, the Investigative Committee said in an online statement.
If convicted on negligence charges, the officials could be handed prison terms of up to seven years.
Last month, police charged the boat's tour operator and a local river fleet inspector.
(Reuters, MT)