A minibus full of students from a south Auckland tertiary education institute was shot at as it returned to campus after a field trip this afternoon.
The vehicle was carrying 15 people from Te Wananga o Aotearoa in Mangere, including students and teachers.
Police said it was travelling on State Highway 20 between Massey Rd and Puhinui Rd shortly after midday when a car entered the motorway at Massey Rd and drew up behind in the right-hand lane.
Passengers saw what they believed was a pistol pointed at the vehicle before a window shattered.
The minibus got off the motorway at Puhinui Rd.