Amateur video from Washington appears to show a police car speeding in to a barrier after an incident which saw Capitol Hill on lockdown.
ITV News cannot independently verify this video.
More top news
Mainly dry and bright but a cold easterly wind developing
Police have released CCTV images in the search for missing Katie Grout, from Berwick.
Transformers star Shia LaBeouf has been arrested for public intoxication.