London: A terminal at Heathrow Airport was evacuated Monday because of possible hazardous material, the London Fire Brigade said.
A Heathrow spokesperson said the check-in area at Terminal 4 was closed and evacuated while emergency services responded. The terminal was evacuated as a precaution, the fire department said.
The airport asked passengers not to travel to the terminal. Crowds of passengers could be seen outside.
All other terminals were operating.