On Monday, a US airline flight from London to Philadelphia landed in Ireland after cleaning chemicals leaked in the aircraft cabin.
An American Airlines spokesperson said the flight 729 from London Heathrow to Philadelphia change direction to Dublin because of an odour caused by a spilled cleaning solution in the galley.
Katie Phillips, a passenger on the diverted flight, said in a tweet that "chemical spills" caused "sickness outbreak" on the plane.
Phillips said: "When they suspected an odour, we delayed nearly one hour at Heathrow," Phillips said, adding that the plane was still taking off.
After the plane took off, people on the plane began to feel uncomfortable including a crew member.