Two London underground stations on Oxford Street have reopened after an incident that police initially treated as if it might be terrorist-related, the city's transport authority said on Friday.

"Oxford Circus and Bond Street stations now both reopened and all trains are stopping normally," the transport authority said on one of its official Twitter accounts.

READ: London police say responding to reports shots fired on Oxford Street

READ: UK transport police say one minor injury at Oxford Circus, no other casualties

Police have said there is no evidence that shots had been fired or that there were any serious casualties.