Jet Airways' shares gained nearly 6 per cent to Rs 309 apiece after the publication of reports that Etihad Airways has extended a deadline to acquire a 24 per cent stake in the Indian carrier.

Abu Dhabi-based Etihad Airways extended the deadline for gaining regulatory approval for the proposed acquisition deal to September 30. The previously-fixed deadline ended on August 31.

A report published by Reuters also said that Etihad expected its proposed deal to be cleared by Indian civil aviation regulators very soon.

The report said, "Etihad Airways expects a $600 million investment in Jet Airways to be cleared by Indian authorities imminently, as it further extended a deadline for regulatory approval that ended on 31 August."

It is the second time when Etihad has agreed to extend the deadline for the acquisition deal for gaining regulatory approvals.

The Foreign Investment Promotion Board (FIPB) has already approved Jet's plan to sell a 24 per cent stake to Etihad.

Mumbai-headquartered Jet Airways, India's second largest carrier, is going to be the first beneficiary of Indian government's policy change that lets foreign direct investment (FDI) in domestic airlines.