Bids for insolvent airline Niki due by Thursday-administrator

Bidders for insolvent airline Niki have until Thursday to submit their offers for the Austrian unit of collapsed Air Berlin, its administrator said Monday. "None of the possible buyers have presented a binding, fully financed offer, but there are indications of interest," Lucas Floether told German news agency DPA. "We have set a deadline for binding offers for midday Thursday," he said, while declining to provide details on the bidders. Niki filed for insolvency last week after Lufthansa scrapped plans to buy its business, grounding the airline's fleet and stranding thousands of passengers. Founder and former Formula One champion Niki Lauda, as well as Thomas Cook and Ryanair, have expressed an interest in taking over Niki. <br/>