“There will be a significant police presence in the area this morning as we work to find out what has occurred and who is responsible,” a police spokesperson said.
Post Haste and Freightways have been approached for comment.
Pakuranga MP Simeon Brown said he was “horrifed” by the shooting.
“This will be incredibly disturbing for the community and neighbours.”
She was waiting for her friend’s children, who lived in Pixie Pl, to walk down Marvon Downs Ave to take them to school.
She said police had told her friend to stay inside for at least four hours.
Detective Inspector Kerry Watson said from the cordon that it was a “critical incident”.
He was unable to confirm any injuries but said there would be a lot of police resources in the area.
“It’s going to take us some time to piece together what happened in the events that led up to this critical incident.”
Pakuranga residents reported on social media that they had seen at least 14 police cars and several armed officers. Ambulances were also in attendance and the police Eagle helicopter was flying overhead.
Local school Elm Park said a “strong police presence” had responded to the incident.
“Police have responded ... please note there is no immediate danger to Elm Park School,” principal Sarah Baleicakau said in a message to the school community.
“I have spoken to the police this morning and have been fully assured the school can remain open.”
Watson said police would focus on making sure children got to school safely.
Some residents said they heard what they believed to be gunshots at 6.40am.
“Doesn’t sound great with that many sirens,” one wrote on social media.
“It’s insane. So many sirens,” said another.
For students attending Elm Park School this morning, Baleicakau said: “There is a strong police presence, which may inhibit access to the school from the Cascades Rd side.”
Hato Hone St John referred all questions to the police.
Anyone who can provide information is urged to call police on 105 quoting the reference number P059690585.