The armed offenders squad from Dunedin and Central Otago police assisted Child, Youth and Family staff to execute a warrant at a Central Otago address yesterday.
Detective Sergeant Derek Shaw, of Alexandra, said there were no arrests and no-one was injured.
"I can't be specific about where this happened, because that might identify the family and we need to ensure the privacy of the family, " Det Sgt Shaw said.
Four Central Otago police staff were involved.
The armed offenders squad had been called "as a precaution, because of the nature of the information we'd received," he said.
Everyone at the address had been co-operative and the matter was concluded quickly, Det Sgt Shaw said.
The warrant being executed had been issued by the Family Court.
He declined to give any further details about the incident.
