BALTIMORE (WJZ) — The northbound lanes of I-895 near the Harbor Tunnel are closed because of a four-car crash.

It happened Wednesday afternoon about one mile before the tunnel.

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Authorities say four cars collided. Two people  were transported to Shock Trauma for their injuries.

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A third victim was treated at the scene and refused medical treatment.

Due to the extensive damage to the vehicles and debris on the roadway, it appears I-895 traffic may be delayed for more than an hour.

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The cause of the crash is being investigated by the Maryland Transportation Authority Police.