Drivers are being urged to take extra care on the county's roads due to icy conditions.
The warning comes as the Met Office continues to have a yellow warning for ice in place for the east of England.
Officers in the south Norfolk area have reported being called to a number of crashes overnight.
CHECK OUR LIVE TRAFFIC MAP BEFORE YOU TRAVEL
The @SouthNorfPolice twitter account tweeted in the early hours of this morning: 'Reports of numerous RTC's across #SouthNorfolk tonight. The roads locally are very slippery, please drive to the conditions and leave plenty of time to stop.'
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here