Thunder Bay police are looking for suspects after an attempted robbery at a coffee shop this morning.

A man carrying a knife entered the Robin's Donuts outlet at 300 S. May St. just before 4 a.m. and demanded money, police report.

However he fled when he noticed the robbery alarm had been activated.

The suspect is being described as 30 to 40 years old and wore a black hooded sweater.

No one was injured in the incident.

Police are asking anyone with information to contact Crime Stoppers at 623- 8477.