SUMMERDALE (WPVI) -- Philadelphia police say two men threw a powder and a liquid on a SEPTA bus driver on Monday morning in the Summerdale section.
It happened around 6:30 a.m. at Rising Sun and Adams avenues.
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Police say the men boarded the Route K bus, threw in a powder and a liquid on the driver, then fled on foot.
Both the liquid and the powder were tested, police say. Neither was found to be harmful.
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The bus driver was not injured.
The incident remains under investigation.