One seriously injured in three-vehicle crash south of Northland's Ruakaka

At least one person is seriously injured following a three-vehicle crash on State Highway One - south of Ruakaka in the Whangārei district.

Emergency services were called to the crash which happened on the stretch between Doctors Hill Rd and Mountfield Rd at 6.50 pm.

A police spokesperson said three people were also reported to have suffered minor injuries.

They said lanes in the centre of the road were blocked and motorists should expect delays in the area.