Three students were stood down and told to self-isolate after leaving Auckland to attend classes at the Toi Ohomai Institute of Technology's Windermere campus in Tauranga.
Toi Ohomai chief executive Leon Fourie confirmed the students were at the Tauranga campus on three days and attended four classes this past week.
"As soon as we found out, they were stood down," he said.
"Prior to leaving Auckland, the students contacted the Ministry of Health for guidance, produced negative Covid tests, and relevant documents to border staff, and were permitted to travel through.
"As soon as Toi Ohomai was made aware of the students' travel history, as a precautionary measure, they were immediately stood down from class and instructed to self-isolate at home."