New Major Terrorist Attack in London?

I hope not, but initial reports from the Telegraph are looking pretty bad:

One person has been arrested after a vehicle struck pedestrians, leaving “a number of casualties” in north London.

Officers were called at 12.20am on Monday to Seven Sisters Road, the Metropolitan Police said.

London Ambulance Service said: “We have sent a number of resources to an incident in Seven Sisters Road.”

The incident reportedly happened close to Finsbury Park mosque.

All hell breaking loose in Finsbury park. pic.twitter.com/sYE9PBhsi6

— ben tovey (@ben_tovey) June 18, 2017

Consider this the overnight thread.