(CBS) – Authorities were investigating a suspicious package on a No. 82 CTA bus on Chicago’s Northwest Side.

Chicago police say an unattended backpack was discovered on the bus around 4:30 p.m. in the 3700 block of North Kimball. This is at the normally busy intersection of Kimball and Elston avenues in the Irving Park neighborhood.

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Police-scanner dispatches indicate a man threw the backpack onto the bus, shouted something and ran off. The bus was then evacuated.

A CTA bus awaits bomb squad investigators at Kimball and Elston avenues. (CBS)

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Authorities closed the intersection while the bomb and arson unit removed the item.

Buses along the route were re-routed.

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