Police arrested a Massachusetts man they say came to Greenwich thinking he was going to have sex with a teenager.

Police say 36-year-old John Cesarini began an online relationship with someone he thought was a 13-year-old girl but was actually Greenwich police.

Officers say Cesarini sent several pornographic pictures and arranged to come to town for sex Monday afternoon.

Police were waiting for him when he got to Greenwich.

Cesarini is charged with attempting to have sexual contact with a victim under 16, attempted sexual assault and attempting to entice a minor by computer.