Part of airport was evacuated and 21 people fell ill but police found no sign of any hazardous material
Police were called to Heathrow late on Monday afternoon when 21 people fell ill in Terminal 4. Initial reports suggested a hazardous material could be involved and part of the airport was evacuated. But when the emergency services conducted a thorough search, no trace of any adverse substance was found.
A source within the Metropolitan police subsequently suggested the event could be something quite different – a case of mass hysteria. And some experts agree.
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