The US Capitol police chief has told waiting reporters that they believed there was a child in the car involved in the incident and that he did not have any information on the person driving the car.
He said that multiple scene involved are now secure and said he had no information that the incident was related to terrorism and is anything other than an isolated incident.
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Youth work charity Kids Company is to stop running services from Wednesday evening, it has been reported.
If the high-profile charity does close, its demise will have a huge impact - not only on those it helps but also on its supporters.