Four police recruits have been stood down pending investigations into their conduct while they were studying at the Royal New Zealand Police College.
Superintendent Scott Fraser said the investigation into the four trainee police were launched following allegations of misconduct in separate incidents.
None of the recruits were on duty at the time, he said.
Three of those under investigation were not onsite at the college when the incidents allegedly happened, he said.
A group of recruits from Wing 318 were investigated for drinking alcohol in July, in a separate matter.
This incident was investigated and the College was satisfied the recruits had changed their behaviour, Mr Fraser said.
Those recruits all graduated earlier this month.
The intake for Wing 318 at the Porirua college in June was the largest in more than a decade.
The government is aiming to recruit 1800 new police officers over three years as part of its coalition deal.