Heathrow’s Terminal 4 was evacuated on Monday evening after reports of a possible hazardous-substance incident. Specialist units from the London Fire Brigade, the Metropolitan Police and the London Ambulance Service responded; the first call came at 5:01 pm BST. After a thorough sweep, no trace of any hazardous material was found and the terminal was declared safe. Operations resumed later in the evening.
The London Ambulance Service treated 21 people, transporting one to the hospital; none of the reported injuries were life-threatening. Heathrow said at 8:27 pm that emergency services had confirmed T4 was safe to reopen and it was working to get flights out as planned, while apologizing for the disruption. Passengers were advised to check with their airlines for updates, as some delays and knock-on impacts were likely.
Sources: Reuters, The Guardian, London Evening Standard, BBC
Images: BBC, The Indian Express