An update from Singapore Airlines on Facebook:
Here is an update on flight SQ317, which diverted to Baku, Azerbaijan earlier today due to a technical problem. A replacement aircraft has now departed Singapore bound for Baku and is due to arrive at around 2300hrs, 6 January, Baku local time. It is expected to arrive in Singapore in the early afternoon of 7 January, Singapore local time.
As we do not operate regular flights to Baku, Singapore Airlines staff have been sent from both Istanbul and Moscow to provide assistance on the ground.
We sincerely apologise to affected customers for the inconvenience caused by the diversion and the lengthy delay encountered at the airport in Baku.
SINGAPORE - A Singapore Airlines Airbus A380 superjumbo made an emergency landing in Azerbaijan on Monday, leaving hundreds of passengers stranded at the airport in the capital Baku.
The service from London to Singapore landed safely without any injuries to the 467 passengers and 27 crew members on board, a Singapore Airlines spokesman said.
"Oxygen masks were deployed and the aircraft landed uneventfully at Baku airport at 01:03 (2103 GMT Sunday)," he told AFP by email.
"We are seeking clearance from local authorities to transfer affected customers to a hotel until a replacement aircraft arrives from Singapore.
Airbus said in a statement that it was "following up on this issue and providing technical assistance to the airline".
Angry passengers took to social media to complain about being stranded in the Heydar Aliyev International Airport instead of being put up in hotels.
"We are not going to a hotel but will be flying out tonight after an 18-hour wait around the duty free area," wrote passenger Nic Coulthard on the Singapore Airlines Facebook page at 0930 GMT.
"I don't think it is inconsistent for passengers to be grateful for a safe landing whilst disappointed at the lack of communication and facilities provided once on the ground," he wrote.
Another passenger, Terri Mann, complained that she had to sleep on a "cold steel bench" with her 17-month old child, and that there were no "food places" at the airport.