File image - A rape evidence kit. Photo: Andrew Ingram

A Free State man was arrested on Thursday for raping his older sister in Zamdela, Sasolburg, Free State police said on Thursday.

He was tracked down by the family violence, child protection, and sexual offences unit after a tip-off, said Constable Peter Kareli.

The 20-year-old arrived at his family's home and raped his 27-year-old sister a month ago. He returned to the house on Friday and broke several windows.

Kareli said the youth would appear soon in the Sasolburg Magistrate's Court. – Sapa