An Air India flight traveling from Tokyo to New Delhi was forced to divert to Kolkata on Sunday after passengers and crew reported unusually high cabin temperatures throughout the journey.

The flight, AI357, departed from Tokyo’s Haneda Airport and was headed to the Indian capital when the airline decided to make a precautionary landing in Kolkata. The diversion was made in response to persistent warmth in the aircraft’s interior.

Confirming the incident, an Air India spokesperson said the aircraft landed safely and was undergoing technical inspections to determine the cause of the problem.

"Flight AI357 from Haneda to Delhi on June 29 was diverted to Kolkata as a precaution after elevated cabin temperatures were observed during the flight. The aircraft landed safely and is currently being examined by our engineering team,” the airline said in an official statement.

Air India added that efforts were underway to assist the affected passengers. Ground staff in Kolkata are helping with onward travel arrangements and providing necessary support. “We sincerely apologise for the inconvenience caused and are working to ensure passengers reach Delhi as soon as possible,” the statement said.