Russia’s second largest airline, Transaero, has been grounded after Aeroflot pulled out of a take-over deal earlier this month.

The airline had been struggling financially, with a take-over by the state-controlled Aeroflot being the last hope for the airline. The deal collapsed at the start of the month and two creditors began bankruptcy proceedings.

Russia’s Ministry of Transport announced the airline’s operating certificate was cancelled yesterday, citing there was a threat to passenger safety.

Following the news of the collapse, Aeroflot today announced it would introduce four 747s and 10 Boeing 737-800s to help fill the demand. Of Transaero’s 141 routes, 56 have been transferred to Aeroflot and its subsidiary Rossiya Airlines.