Newport motorists were warned about delays due to a crash that closed part of M4 in Newport.
Traffic Wales stated that it is affecting traffic between Junction 24 Coldra, and Junction 25 Caerleon.
According to traffic analysts Inrix, westbound vehicles are being turned around so that they can be taken off the carriageway via Junction 24's entry slip.
South Wales Police reported that a separate accident had shut down Junction 30 at Cardiff Gate. This affected eastbound traffic.