The male offender is described as tall and skinny, around five-foot-nine-or-10 inches and in his early 20s. Police said he was wearing a grey face mask.
Both of the female offenders were aged between 16-18 and were around five-foot-three-to-five-inches tall.
One of the women had shoulder length black hair and one had shoulder length brown hair, possibly with some purple running through it.
"There will be people in our community who know who these people are, and we want to hear from you," Detective Senior Sergeant Ryan said.
Those who might know the offenders, or can provide information to Masterton Police are asked to contact Detective Gillian Flower at Masterton Police Station.
Information can also be provided anonymously via Crimestoppers on 0800 555 111.