A UK airport terminal has been evacuated as firefighters respond to a "possible hazardous materials incident", the London Fire Brigade has said.
In a post on X, Heathrow Airport advised passengers not to travel to Terminal 4 as emergency services responded to an incident on Monday evening.
A London Fire Brigade spokesperson said: "Firefighters are responding to a possible hazardous materials incident at Heathrow Airport.
READ MORE: Disgruntled neighbour threatens to 'return' cat poo to owner in 'unfriendly' note
READ MORE: Duo due in court after man suffers 'fractured jaw' in Wolverhampton robbery
"Specialist crews have been deployed to carry out an assessment of the scene, and Terminal 4 has been evacuated as a precaution while firefighters respond.
"The brigade was first called a