A van has reportedly mow down pedestrians outside a mosque in London causing a "number of casualties".
Scotland Yard said that one person had been arrested in the apparent attack.
Metropolitan Police say they are attending a "major incident" at Seven Sisters Road.
CNN is reporting that the incident occurred near a mosque as people were leaving a service.More news: Still Swinging for the Fences — Trump Travel Ban
We will focus on reports from police officials and other authorities, credible news outlets and reporters who are at the scene.
British radio station LBC radio reported the vehicle was a van. "Inquiries continue. More information will be released when confirmed", the police said in a statement.
Transport for London tweeted that Seven Sisters Road was closed northbound at Hornsey Road and southbound at Rock Street.
It was not immediately clear if the incident was an accident or a terror attack.