A girl was allegedly raped inside Fort William, Indian Army's Eastern Command headquarters in Kolkata today, the police said.
A case was registered against the accused, a Group D staff of the Army, under the Protection of Children from Sexual Offences (POCSO) Act.
The incident took place on Saturday evening. The girl, daughter of another Army employee, was home alone when the accused raped her.
The accused fled after committing the crime and he was arrested on Tuesday night, police said.