Update 10.47am: The Dublin Port Tunnel has now fully reopened both ways following a truck fire.
Dublin's Port Tunnel is closed in both directions due to a truck catching fire this morning.
Emergency services are at the scene and gardaí are directing traffic.
DUBLIN: Collision affecting traffic southbound just before the Port Tunnel which is in the left lane. https://t.co/pdsEzJTRQr— AA Roadwatch (@aaroadwatch) August 15, 2017
Knock-on delays on the M1 and M50 are expected.
Northbound traffic is already slow from East Wall Road, according to AA Roadwatch.