PLOVER, Wis. (AP) Police are asking prosecutors to file more charges against a doctor already accused of sexually assaulting seven patients at a Plover clinic.

Forty-five-year-old Wilton Calderon of Old Lyme, Connecticut, practiced at the Ministry Medical Group Plover clinic for several years. He left in early 2015 and was charged in December with multiple counts for allegedly fondling seven women.

Stevens Point Journal Media reports police are seeking additional charges for two more victims. At least 13 people have come forward since details about the case were released last week.

Portage County prosecutor Elizabeth Constable says she's unsure when more charges will be filed.

Online records don't list an attorney to comment on Calderon's behalf. A message couldn't be left at his Connecticut office, and a home number is not listed.