HILLSBORO, Ore. -- A 30-year-old woman tried to rob a bank Wednesday by handing a teller a threatening note, but the teller couldn't read her handwriting, police said.

Hillsboro police said Stephanie Martin walked into a Wells Fargo bank in Hillsboro and handed the teller a note that read, "Need $300 or I'll kill you. I'm serious."

The teller told Martin she couldn't read the handwriting, police said. Martin then walked to a counter and re-wrote the note on a bank slip, according to Lt. Mike Rouches, of the Hillsboro Police Department.

The teller then hit the silent alarm and the bank's manager asked how he could help Martin, Rouches said.

Martin then said she wanted to open an account with the bank, according to officers.

Police and FBI agents arrived at the scene and arrested Martin, who police determined was under the influence of drugs, Rouches said.