LONDON: Six people were believed to have been injured on Saturday after a group of males reportedly sprayed a noxious substance in an area around a large shopping centre in east London, police said.

The incident near the Westfield shopping centre in Stratford was not being treated as terror-related, a police spokesman said.

?A number of people have been reported injured at different locations - believed to be six people. We await further details,? London?s Metropolitan Police said in a statement.

One male was arrested on suspicion of causing grievous bodily harm, the statement said.