Police believe an officer crashed his patrol car in Auckland this morning after he became ill.
The officer, aged in his 30s, is still in a critical condition in a North Shore hospital.
Police say he was on his way to a routine inquiry when his car left the road in the North Shore suburb of Mairangi Bay.
The accident happened at the junction of East Coast Road and Hastings Road in at 7.50am.
They say they would like to thank members of the public who stopped to help, including some who carried out first aid.