The A6 has been closed at the A5001 John Clarke Way junction near Rushden after an accident earlier today.
A lorry appeared to have shed its load of huge rolls of paper onto the carriageway – which are in the process of being cleared by a recovery truck.
Police officers were called to the scene at about 11am.
A spokesman for Northamptonshire Police said the accident involved a lorry and no other vehicles. No-one was injured.
Temporary diversions through Rushden have been put into place.