Local, state and federal authorities visited sex offenders last weekend for compliance checks.
The Riley County Police Department participated in a joint effort to maintain accurate information of registered sex offenders in the Manhattan and Riley County area.
More than 100 compliance verifications were conducted on registered sex offenders. Four registered offenders were found to be non-compliant, and cases are being reviewed for violations.
The operation, called Operation RED Little Apple took place Thursday through Saturday. It was a partnership between the RCPD and the U.S. Marshals Service Sex Offender Investigations branch.
Riley County residents can find out more about registered offenders at the website for the Kansas Bureau of Investigations, http://www.kbi.ks.gov/registeredoffender/.