State Highway 3 in Hāwera is blocked after a truck has rolled this morning.

Emergency services were called to the incident, between Kerry Road and Ohangai Road, at about 8.40am.

Motorists are advised to take extra caution when travelling north on State Highway 1, just north of Evansdale Glen Road following a diesel spill.

Rakaia Highway is closed between Racecourse Road and Northpark Road in Allenton following a crash.

The two-vehicle crash was reported just after 5am.