The Waterloo Police Department is warning of an uptick in catalytic converter thefts again in the area. The new reports have come from parking lots at Tyson and UnityPoint Hospital and have taken place both during the day and the night. There was a significant amount of catalytic converter thefts in the Cedar Valley in 2021 but a joint law enforcement effort led to several arrests and a large decrease in cases. The department says to call 911 if you see anything suspicious and do not approach the individual.