The turnoff for Castledawson has been closed following a crash at the roundabout this morning.
It is understood two vehicles were involved in the collision.
Police are asking the public to bear with them as traffic is heavy.
The PSNI said: "Officers from C Section are currently dealing with a two vehicle RTC at the Castledawson roundabout which has meant we've had to close the turn off for Castledawson.
"Traffic is heavy in the area so please bear with us.
"Our priority is making sure everyone is ok, gets medical treatment and making sure the road is clear and safe for other traffic.
"The road should be cleared shortly."
More as we get it.