Around 150 people have been evacuated from their homes after a strong chemical smell was reported in a store cupboard.
The incident happened on Inskip Drive in Hornchurch at around 1.30pm this afternoon (Tuesday April 17).
Four crews from the London Fire Brigade were on hand to put up a cordon and evacuate people from nearby buildings.
A spokesperson for London Fire Brigade said: "We were called at 1.29pm to reports of a smell of chemicals in a store cupboard.
"150 people have been evacuated and a cordon has been put in place as a precaution.
The Metropolitan Police are also at the scene.