The flying licence of India's Kingfisher Airlines has been suspended after the debt-laden carrier failed to satisfy the aviation regulator's concerns about its operations, a report said on Saturday.
The licence of the airline has been "suspended until further orders", the Press Trust of India news agency said, citing officials from the country's Directorate General of Civil Aviation (DGCA).
The airline's fleet had already been grounded since the start of this month after its staff went on strike over unpaid salaries.
Kingfisher, which has billions of dollars in debts, has not paid staff for seven months and is desperately seeking a foreign buyer to save it from complete collapse.
The DGCA had asked the carrier earlier this month why its licence to fly should not be cancelled as it was not adhering to flight schedules, "causing great inconvenience" to the travelling public.
A Kingfisher spokesman did not respond to phone calls by AFP for comment.