There have been reports of a two-car collision on State Highway 33 north of Okere Falls this morning.
A reporter at the scene said cars were blocking the north-bound lane.
She said people earlier were helping to direct traffic but the fire service had taken over and traffic flow was down to a stop/go.
A police media communications spokeswoman confirmed police had been called to a crash near Okere Falls at 7.32am.
The spokeswoman said the crash happened about 8km north of Okere Falls on State Highway 33.