Police are looking for a masked man who may have held a gun to a woman's head in Christchurch.
The incident happened at about 1am this morning on Riccarton Avenue.
The woman was approached from behind and the object, believed to be a gun, was pressed against her head.
She screamed and the man ran off.
The offender is described as slim with dark hair, less than 160 centimetres tall, and aged in his 30s or 40s.
He was wearing a baggy grey hoodie, dark trousers and a beige Halloween-type mask, and was carrying what appeared to be a small dark-coloured firearm.