Whangārei police are asking motorists to avoid High St in Raumanga where a crashed car is "tangled" with a toppled power pole and blocking the road.
The Holden Commodore crashed into the power pole near the intersection of Collingwood Rd and High St around 1.43pm on Monday.
Senior Sergeant Brian Swann, of Northland police, said two women were inside the vehicle when it crashed.
St John spokeswoman Beverley Tse said two patients in a moderate condition were treated and taken to Whangārei Hospital.
Whangārei firefighters and St John paramedics responded to the crash alongside police.