Two planes have collided on the airfield at Heathrow Airport.
It is understood the Icelandair and Korean Air aircraft were involved in a “minor collision” on Wednesday evening.
Emergency services were attending the scene, but London Ambulance Service said no one required treatment.
The Guardian journalist Dan Sabbagh, who was a passenger on the Korean Air plane, said it appeared to have “clipped” the other aircraft.
“I’m on Korean Air plane that clipped an Icelandair plane at Heathrow," he wrote. "A passenger on the other side saw the incident, told me the wing of our plane damaged the others’ tail.
“I was on this plane but can’t say we felt anything from the inside. No apparent danger, nobody hurt.”
An airport spokeswoman said: “Emergency services are attending an incident involving two aircraft on the airfield.
“No injuries have been reported but emergency services are attending to ensure all passengers and crew are safe and well.”
London Fire Brigade also attended.
The ambulance service spokesman said: “We were called today at 8.06pm to reports of an incident at Heathrow airport.
“We attended a reception centre for passengers but nobody required treatment or needed to be taken to hospital.”
The incident is being investigated.
While it is understood there was no significant effects on departures or arrivals, passengers are advised to check with their airlines on the status of their flights.