London police say they are dealing with major incident

British police say they are investigating a "major incident" at Seven Sisters Road in north London following reports of a vehicle ploughing into pedestrians.

Authorities say "a number of casualties" are being treated at the scene.

"We have sent a number of resources to an incident in Seven Sisters Road. More information will follow when we have it," London Ambulance Service said on Twitter.

A statement from London's Metropolitan Police said one man had been arrested.

More to come.