PITTSBURGH (KDKA) – Police are investigating a crash that left four people injured in Mt. Lebanon.

It happened around 8 a.m. near the intersection of Route 19 and Mt. Lebanon Boulevard.

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Police say four vehicles collided.

Four people were also injured in the accident – one of whom is in critical condition.

Police are still on the scene investigating.

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Traffic is being detoured along Route 19.

It’s unclear what initially caused the accident.

Stay with KDKA for more information.

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