The Arbitration Court of Saint Petersburg and Leningrad region has put Transaero Airline under external supervision, in a decision published on the court’s website Dec. 16, ATWonline reported.

Russia’s Sberbank filed a bankruptcy motion against Transaero on Oct. 19, after Aeroflot’s plans to acquire Transaero fell through.

Transaero’s overall debt reached RUB250 billion ($3.72 billion), Interfax agency reported Sept. 4, quoting Sberbank president Herman Gref. Sberbank is one of Transaero’s biggest creditors. Russia’s Federal Air Transport Agency, Rosaviatsia, suspended Transaero Airlines’ ticket sales from Oct. 1, 2015. The carrier’s air operator’s certificate was canceled Oct. 26.

Aeroflot carried Transaero passengers through Dec. 15. Since the beginning of September, Aeroflot said it has carried 1.9 million Transaero passengers.