Highways England have confirmed that the A47 near Scarning remains closed in both directions following a serious accident involving two lorries.
The crash occurred shortly before 8.30am on Thursday morning and appears to have involved two lorries which were travelling along a straight section of the road between the A1075 and A1065.
Three fire engines were at the scene, along with two ambulances and the East Anglian Air Ambulance.
The condition of the two drivers has not been confirmed.
One of the vehicles involved was operated by delivery company, DHL. A spokesperson said: 'DHL can confirm that one of its vehicles was involved in a serious road traffic collision this morning on the A47 Southbound, near Norwich.
'We are cooperating fully with police in their investigation. While this is underway we are unable to comment further, except to confirm that the safety of the public remains of paramount importance to the company'.
The road was initially expected to reopen sometime between 1.30pm and 1.45pm but Highways England now estimates it will reopen at 6.30pm.
Diversions are in place and further details can be found on the Highways England website.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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