A man broke into a house in Amberley, north of Christchurch, early this morning, holding a victim at gunpoint while ransacking their home.
There are unconfirmed reports that gunshots were heard.
The victim managed to escape from the house and contact neighbours, who called the police, but the intruder escaped.
Police are asking anyone who saw anything suspicious in Amberley about 3am today to come forward.
The incident is separate to an armed robbery this morning in Springston, which is about 25km southwest of Christchurch.