The Tiruvottiyur All Women Police on Sunday arrested a 20-year-old daily wage labourer for sexually assaulting a 14-year-old girl in Old Washermenpet.

According to City Police, the girl, a Class IX student, became acquainted with Sanjay, a resident of Davidson Street in Broadway, through social media. On September 2, she left home for school in the morning but did not return in the evening.