Some 11 people, including crew and passengers, fell ill with suspected food-poisoning on an Air India flight from London, witnesses have reported. Passengers reported feeling dizzy and nauseous on the flight to Mumbai on Monday.

Air India confirmed what happened, but said only five passengers and two crew members fell ill. Eyewitnesses said as many as 11 people, including six crew, had been affected. The pilots weren’t affected because their food was separate from passengers and crew, according to reports.

The Hindustan Times reported a statement from Air India, which reads: “On board flight AI-130 from London Heathrow to Mumbai, five passengers and two crew reported feeling dizzy and nauseous during different phases of the flight.

“Our medical experts were prepared to offer prompt medical aid after the airplane safely touched down in Mumbai.

“Two passengers and two cabin staff members who were still feeling ill after landing were brought to the hospital room for additional testing before being released. We have informed the regulator and are looking into the incident.”

The Boeing 777 landed in Mumbai, where medical teams were on standby to help those affected.

Two passengers and two crew members who still had symptoms after landing were taken to a medical facility at the airport for observation and tests. They were later discharged.

An airline official said to be familiar with the matter and speaking on condition of anonymity, told the Hindustan Times the passengers and crew fell sick due to a gradual decrease in cabin pressure.

Reports of the incident come after an Air India flight from Birmingham to Delhi diverted to Riyadh amid a reported bomb threat.

That came after the Air India disaster in Ahmedabad earlier this month, which killed all but one of the 242 people on board. At least 29 people were killed on the ground.

The plane was carrying 169 Indian nationals, 53 Britons, seven Portuguese nationals and one Canadian.

Extra safety checks on Air India’s Dreamliner fleet in the wake of the disaster led to flight delays, cancellations and anxiety among passengers.