A terminal at Heathrow Airport has been evacuated as fire crews have been called to a “possible hazardous materials incident”.
The incident has taken place in Terminal 4 at the airport, where passenger check-in is currently closed.
A Heathrow Airport spokeswoman said: “Terminal 4 check-in has been closed and evacuated while emergency services respond to an incident.
“We are asking passengers not to travel to Terminal 4 and supporting those on site. All other terminals are operating as normal.
“We will provide further information as soon as we can.”
The London Fire Brigade confirmed part of the airport had been evacuated “as a precaution”.
A spokesman said: “Firefighters are responding to a possible hazardous materials incident at Heathrow Airport.
“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 brigade was first called about the incident at 5.01pm, and crews from Feltham, Heathrow, Wembley and surrounding fire stations have been sent to the scene.”
National Rail has said trains are currently not calling at Heathrow Terminal 4 “due to emergency services dealing with an incident”.
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