ANN ARBOR, Mich (WXYZ) - Women in Ann Arbor are being warned to be extra careful when riding alone in a cab.
Police are investigating three separate attacks.
The most recent took place early Sunday when a 23-year-old woman says a driver in a Blue Cab minivan touched her thigh and kissed her on the mouth.
Another woman reported being sexually assaulted about a week ago.
The first attack was reported last month.
Investigators say the descriptions of the attackers, as well as the cabs, appear to be different.