A man accused of sprinkling mouse poison and hand cleaner on produce at several self-service food bars in Michigan grocery stores over the last two weeks has been arrested, the F.B.I. and local police said on Tuesday.

Images taken from surveillance video at a supermarket and published online by the F.B.I. showed the man carrying a red basket in a grocery store, walking past a display of avocados and down aisles.

The man was identified by members of the public and arrested by the agency and the Ann Arbor police, but his name had not been released as of early Wednesday.

The authorities said the man was suspected of contaminating food in several Ann Arbor grocery stores, including a Whole Foods Market, a Meijer and a Plum Market, over the last two weeks. It was not clear if anyone had been sickened by the poison or how it had been detected.