India's government said Friday it would investigate Jet Airways' ability to keep flying as the debt-stricken carrier fights for survival.
The announcement came after Jet cancelled most of its international flights Thursday and as lenders desperately seek a buyer to keep the beleaguered airline running.
A collapse would deal a blow to Prime Minister Narendra Modi's pro-business reputation as Indians vote in a mega six-week-long election that started Thursday.
Aviation minister Suresh Prabhu tweeted that his ministry would "review issues related to Jet Airways" and "take necessary steps to minimise passenger inconvenience and ensure their safety".
Jet was until recently India's second-biggest airline by market share but is close to going under with debts of more than $1 billion.
The Mumbai-based carrier has been forced to ground the majority of its fleet after months of defaulting on loans and struggling to pay lessors and staff.
It told the Bombay Stock Exchange Thursday that it had grounded 10 more planes due to non-payment.
The airline is believed to now be operating just 16 planes out of a fleet of 119. That is below the 20 required by Indian aviation regulators to fly overseas.
Thousands of customers have been stranded in recent weeks after hundreds of flights were cancelled, in some cases with little or no notice.
All of Jet's long-haul flights were cancelled on Thursday, including to London, Paris and Amsterdam. They were due to run later on Friday.
Thursday and Friday services to Colombo and Singapore were also cancelled.
Close of play Friday is the deadline for prospective bidders to express an interest in acquiring a 75-percent stake in the airline.
A consortium of lenders led by the State Bank of India started the stake sale process on Monday. Any interested parties will then have until April 30 to make a formal bid.
Several airlines, are interested in bidding according to reports.
The consortium took control of Jet Airways last month after creditors injected $218 million of "immediate funding support" as part of a debt resolution plan.
The deal saw founder Naresh Goyal step down as chairman.