Terminal 4 at Heathrow Airport was evacuated on Monday evening after firefighters responded to a possible hazardous materials incident.
The London Fire Brigade said it was called to the airport at 17:01, deploying specialist crews from Feltham, Heathrow, Wembley and surrounding stations to assess the situation. A spokesperson confirmed that part of the airport had been cleared as a precaution while investigations were carried out.
The Metropolitan Police has confirmed that a number of people have been taken ill at Heathrow Airport’s Terminal 4, which was evacuated earlier during a possible hazardous materials incident.
In a brief statement, the Met said none of those affected are in life-threatening condition and no arrests have been made.
The London Fire Brigade (LFB) has confirmed it is standing down its response to the incident at Heathrow Airport’s Terminal 4, which was evacuated earlier following reports of a possible hazardous materials situation.
In a statement issued at 20:18, the LFB said specialist crews had carried out an assessment of the scene. Terminal 4 check-in was evacuated as a precaution while the work took place.
Around 20 people were assessed at the scene by paramedics from the London Ambulance Service. None were reported to be in life-threatening condition.
The cause of the incident has not yet been established and remains under investigation.
Heathrow Airport issued a statement confirming that Terminal 4 check-in had been closed and evacuated, and asked passengers not to travel there. The airport added that other terminals were operating normally and updates would follow “as soon as we can.”
Passengers described being evacuated from the terminal and waiting outside while emergency services responded. National Rail said trains were unable to call at Heathrow Terminal 4 due to the incident.
The London Fire Brigade stated: “Specialist crews have been deployed to carry out an assessment of the scene, and part of the airport has been evacuated as a precaution whilst firefighters respond.”
The nature of the materials involved has not been confirmed, and no injuries have been reported at this stage.
