UPDATE: 12.10pm.

Slow traffic remains on the M4 Eastbound between J26 and J29.

UPDATE: 11.21am.

Welsh Ambulance Service and South Wales Fire and Rescue spokesmen confirm that no crews were sent to the scene.

All lanes in the tunnels have re-opened but traffic is continuing to build with congestion reaching Junction 29.

The lane closures were lifted at 11.15am.

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CONGESTION is building on the M4 Newport Eastbound following a four-vehicle crash in the Brynglas Tunnels.

The crash happened at around 10.30am and is causing congestion at M4 J26 Malpas back to Junction 28 at the A48/A467 Forge Road.

Lane two of two remains blocked following the accident in the tunnel.

One lane is blocked inside the tunnel as a result of the crash.