Police had earlier said they were responding to reports of shots fired as if they could be terrorist-related.
"To date police have not located any trace of any suspects, evidence of shots fired or casualties," the Metropolitan Police said in a statement.
"If you are in building stay in a building, if you are on the street in Oxford Street leave the area," they added.
(Reporting by David Milliken; editing by Stephen Addison)
© Thomson Reuters 2017
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