PHILADELPHIA (CBS) — A multi-car accident on Roosevelt Boulevard in Northeast Philadelphia is causing a traffic mess heading into the Monday evening rush hour.

Crews were called out around 3:30 p.m. on the boulevard between Summerdale Avenue and Oxford Circle for an accident involving four cars.

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People were injured in the accident but the extent of their injuries is unclear at this time.

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The lanes are currently blocked and traffic is getting by on the shoulder.