(AP) -- Police in St. Louis are searching for a bank robbery suspect.

The St. Louis Post-Dispatch reports (http://bit.ly/X4z8jl ) that the suspect demanded money from a teller at a PNC Bank branch Saturday and departed with an undetermined amount of cash. Police said the suspect did not show a weapon.

Authorities believe the suspect's clothing may be stained from an explosive dye pack that was embedded in the stolen money.

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