NORWALK - Weston police are looking for leads in their investigation of sexually explicit letters sent to a middle school teacher.

Authorities say the seventh-grade teacher received a sexually explicit and menacing letter at Weston Middle School in January and returned to her home the same day to find a second piece of mail. In total, police say the teacher has received four harassing letters.

Detective Carl Filsinger says police don?t have any leads or suspects in the investigation.

According to Superintendent Jerry Belair, the Weston School District has been working with the teacher to offer her support and help.