A couple of police cars were seen parked outside the building but no other businesses are understood to have been evacuated.
ARA’s campus manager Leonie Rasmussen said the campus would be closing for rest of the day as it would likely take a longer period of time for police to complete their processes.
“Students gathered safely with ongoing support staff and student advisors,” she said in a statement.
“Around 45 students who travel to the Ara campus by bus are being cared for and return buses have been ordered early today. Those with belongings left in classrooms have been assured these will be kept safe by Ara staff once they can access the buildings.”
Waka Kotahi NZ Transport Agency has confirmed State Highway 1 in Theodosia St through Timaru has been closed around the polytechnic between North and Arthurs St, is currently closed.
“People are asked to avoid travel through central Timaru if possible as detour routes are being set up around the city block Arthur St, Grey Road, North St and State Highway 1 or Theodosia St,” a statement said.