Western Waikato police Area Commander Inspector Paul Carpenter said armed offenders squad members used tear gas and distraction devices to gain access to the house.
"The male occupant was not located at the property and we believe he had fled the scene shortly after the incident began," he said.
Police were seeking Toki Ranier Takerei, 26, who they said was armed and should not be approached.
Police said anyone who saw Takerei should call 111, while anyone with information on his whereabouts should call Sergeant Chris Greenwood on 07 858 6200 or the anonymous Crimestoppers line on 0800 555111.