VIENNA, Dec 15 (Reuters) - The sale of insolvent Austrian airline Niki must be agreed within seven days as its valuable runway slots will be lost afterwards, the chief of Niki's works council said on Friday.
So far, former motor racing driver Niki Lauda and tour operator Thomas Cook have expressed an interest in taking over Niki.
The runway slots, one of Niki's most attractive assets, are still valid for seven days, Stefan Tankovits said on ORF radio on Friday.
"This is the time frame in which there must be a solution," he said. (Reporting by Kirsti Knolle; Editing by Maria Sheahan)