Some motorists who filled their gas tanks at a Casey’s General Store in the northern Iowa town of Manly are having their cars poop out. One report quotes a worker at the store who says the truck that brought in the gasoline was previously hauling hog manure and hadn’t been properly cleaned out before being filled with fuel.

Casey’s spokesman Bill Walljasper says they’re looking into the situation. Walljasper says there is clearly a problem with the 89-octane pumps after a trucking company made the delivery on Tuesday. Tests are being done by a third party and preliminary results show there is no water in the tank, so that’s not the issue.

Walljasper says the company will make sure to find out what happened, though he says the reported scenario is highly unlikely. He says they’re working to learn what happened and will make sure it doesn’t happen again. The convenience store chain is working with customers to make sure they are taken care of after this incident.

Walljasper says he’s never heard of trucks that deliver both gas and hog manure. He says: "I’m not saying it couldn’t happen but certainly it would be uncommon. In my 18 years with the company, I’ve not heard of this being a problem at one of our stores." Walljasper hopes tests on the gas will be back no later than Thursday and he encourages anyone who had problems with their car after filling up at the Manly station to contact Casey’s as soon as possible.