Police in the US are looking for a man they believe tried to rob a bank but failed to leave with any money.

The attempted robbery occurred on December 17 in Loveland, in Northern Colorado.

Local police released an image of the suspect, who was dressed in a brown hoodie, a green baseball cap and sunglasses.

They allege the man walked in to a First National Bank branch and handed the teller a handwritten note.

But his handwriting was allegedly almost completely illegible and the teller had difficulty reading it.

While the teller was struggling to read the note, the man reportedly got frustrated.

He then quickly left the bank without any money.