A subsidiary of failed German carrier Air Berlin has been sold to Thomas Cook Group Airlines.

Thomas Cook said the acquisition would give its airline Condor further options for growth.

This was consistent with its plans to grow capacity in the German market to meet increased demand experienced in recent months.

Neither company said how much Thomas Cook was paying, but a person familiar with the deal said the purchase price was a medium single-digit million euro amount, Reuters reported.

Air Berlin, which filed for insolvency in August, has already sold major parts of its assets to Lufthansa and easyJet while British Airways owner International Airlines Group is seeking to acquire Austrian low cost arm Niki.