LINCOLN, Neb. (AP) — Lincoln police have arrested over a dozen people as a result of a multi-state sex trafficking investigation.

Authorities say 13 people were arrested in Lincoln as a part of a sex trafficking sting conducted by a national coalition of law enforcement agencies between Jan. 17 and Feb. 7.

Police say six of the 13 people arrested in Lincoln were potential sex buyers. An additional five people were cited for prostitution and two others for pandering after driving women to hotels for prostitution.

The Lincoln Police Department worked with the Cook County Sheriff’s Office in Illinois during the investigation.

The sting included 23 law enforcement agencies across 14 states and arrested a total of 552 would-be sex buyers and 30 sex traffickers.