The Armed Offenders Squad was called to a house in Highbury after police found suspicious chemicals at the property.
However, Senior Sergeant Steve Crawford said at the scene the chemicals were found not to be dangerous.
Inspector Brett Calkin said police were called to Ronberg St about 2.15pm, after a report of a suspicious person in the area.
The road was cordoned off and police also prevented pedestrians from entering the area.
Two fire trucks and a St John ambulance were also in attendance.
''We were just doing some routine inquiries and we came across some suspicious chemicals,'' Senior Sergeant Steve Crawford said at the scene.
He said the Armed Offenders Squad was called in because they had the chemical gear.
''There's nothing of interest, just erring on the side of caution more than anything,'' he said.
Ihaka Skipper, 16, was watching the events.
He said he was on his way home from school when he was prevented from entering the area.
''I live just on the other side," he said.
"They told us we're not allowed to go through.''
''I'm gutted. I just want to go home cause I'm hungry.''
- Manawatu Standard
Should Manawatu's earthquake-prone buildings be yellow-stickered?Related story: Council won't use earthquake-risk stickers