OMAHA, Neb. (AP) — Omaha police say they’re investigating an incident in which an officer was caught on video speeding in a non-emergency.

A man with a cellphone posted the video on YouTube after following the office to a convenience store, where the officer bought a bag of peanuts.

Police Chief Todd Schmaderer says authorities have launched an internal investigation, but he declined to comment further, saying it was a personnel matter.

Police say officers are allowed to violate traffic laws at times, but the incident in question didn’t appear to be warranted.

Authorities say they appreciate citizens reporting questionable police actions, but say they shouldn’t violate the law. The camera man, who was not identified, acknowledged that he had to speed to follow the officer.