HUDSON (CBS) – Police are looking for a robber who recently left a thank you note at a tool store in Hudson.

The suspect entered the store through an air conditioning unit access point and then stole carbide tips for saw blades on Oct. 12.

He then left a thank you note signed “R.I. 3.”

The same man is suspected in a similar robbery within the last month. Police said he appears to know the tool shop well.

Anyone with information is asked to call Hudson Police at 978-562-7122.