An undercover prostitution sting conducted by Sebastopol police Sunday night resulted in two arrests of women advertising online, Sebastopol police said Monday.

An undercover officer responded to the ads, leading to the arrests of Heather Ann McCrea, 36, of Santa Rosa and Dana Dawnene Stock, 39, of Rohnert Park, said Sgt. Nick Belliveau.

As well as suspicion of prostitution, McCrea was wanted on a $15,000 Marin County warrant and was arrested on suspicion of having methamphetamine for sale, Belliveau said in a release.

She remained in custody Monday morning in lieu of $23,000 bail. Stock was released on bail.