Police have issued a warning over a number of people attending a church service in Auckland on Sunday

Under Alert Level Three no public church services can be held - but places of worship are encouraged to go online.

Police say a man at a Mangere East property was spoken to about the risk to the public from not following restrictions - and he has been given a written warning.

Meanwhile 583 vehicles were turned away from checkpoints between 6am on Sunday and 3.30pm yesterday - out of nearly 39 thousand vehicles stopped.

Police say they'll continue to follow up on reports of alert level breaches - and take appropriate action.