WASHINGTON (WUSA9) -- A serious car accident involving two vehicles has closed several lanes on the George Washington Memorial Pkwy Wednesday evening.

Police said the accident happened around 4:40 p.m. Police said Wednesday evening all lanes were closed as the accident was being investigated.

As of 8:20 p.m., one southbound lane has been reopened. All northbound lanes remain closed, authorities said.

It is unknown at this time how many people are injured.

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