Authorities in Sleepy Eye are investigating ongoing incidents of vandalism and theft that have been occurring in the town over the past week. A series of 3 similar thefts from unlocked vehicles took place last Thursday and Friday, with a total of more than $600 in cash stolen as well as phones, CD players and GPS devices. Three incidents of graffiti on signs in Sleepy Eye have also been reported over the past few days. Authorities are encouraging residents to lock their vehicles at night and immediately report any suspicious activity. Investigators have not yet determined if the different crimes are linked.