WOODBURY — Thirteen men have been charged in several sex trafficking stings in Washington County.

The men are accused of engaging in prostitution with minors beginning in August of last year. The St. Paul Pioneer Press reports undercover officers, posing as minors, placed ads soliciting sex on Craigslist and Backpage.

Six men were arrested last week at the Red Roof Inn in Woodbury. Four men were arrested in a similar sting in October 2014 and three more were taken into custody in August of last year.

Washington County Attorney Pete Orput held off on filing charges in the first two stings until now because police wanted to conduct a third sting. All 13 are charged with hiring or engaging in prostitution of a minor.