Constable Regan Wilson and South at their graduation in August.

They've only been partners since August, but a rookie police dog unit helped arrest a flasher and two thieves in one weekend.

Constable Regan Wilson and his police dog South had "a very good weekend", Sergeant John Hedges said.

Police were called to several reports of a man exposing himself near St Clair Esplanade.

A 41-year-old man was tracked back to a car by the police dog, and arrested by its handler.

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He was charged with indecent exposure, and was expected to appear in court this week.

Police were investigating whether the man was linked to other similar complaints, as there had been "a lot down that way", Hedges said.

The pair also tracked an offender who had been breaking into cars around the Balaclava area.

The dog followed the scent of the person to a local school where he was arrested.

Hedges said the same dog unit also caught a youth who had been breaking into cars in the suburb of Kenmure.

South tracked some of the stolen loot, as well as stolen items from previous thefts. The 15-year-old would appear in Youth Court, Hedges said.

The dog unit had missed the offender the previous night, and returned to the scene the next day, he said.

"He came back on shift and went straight around to where he missed him last time ... and picked him up."

Wilson and South, who is 2-years-old, graduated from the New Zealand Police Dog Training Centre in August.

Wilson, who joined police almost four years ago, said after his graduation that joining the dog section was his "dream job".