Billings Police released the surveillance video from Big Sky Patient Care.
It shows the Sunday morning attempted arson.
It begins with the two suspects spray painting the side of the business. A short time later, you can see one person throw a rock through the glass window, which is followed by a glass bottle filled with flammable fluid and the resulting flash and small fire.
Another medical marijuana business was attacked in the same manner Monday morning.
Police said the video does not help their investigation.
Currently, they are analyzing broken glass from the crime scene for fingerprints.