An ammonia leak at a depot in Belvedere last night required assistance from the HART hazardous team at London Ambulance Service (LAS).
LAS HART tweeted: "We are currently on standby in Belvedere at a large depot with an ammonia leak."
A LAS spokesman said: "We were called at 23.20 to Norman Road, Belvedere to reports of a chemical leak.
"We sent a number of resources to the scene including an ambulance crew and our hazardous area response team.
"No patients were found at the scene."
Ammonia is a colourless gas which can cause poisoning.
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