11.05am – The victim has been named locally as Crusheen businessman and father-of-three Michael Fogarty.
7.10pm – Gardaí have confirmed that the truck driver was arrested at the scene and taken to Ennis Garda Station for interview.
3.05pm – Gardaí have confirmed that the sole occupant of the van, a man in his 60s, was pronounced dead at the scene a short time later. The male driver of the truck was uninjured.
The scene is currently being examined by Garda Forensic Collision Investigators. Local traffic diversions are expected to remain in place until later this evening.
Investigating Gardaí are appealing for witnesses, anyone with information is asked to contact Ennis Garda Station on (065) 6848100 or the Garda Confidential Line 1800 666 111.
Earlier: At least one person has been seriously injured following a collision on the M18 in Co Clare.
The incident occurred at around 12.50pm at the exit to junction 13 near Ennis and is believed to have involved a van and articulated lorry.
The van left the road and crashed into a light pole before overturning on its side trapping the driver inside. The truck driver is not believed to have been injured.
Gardaí were first to arrive at the scene and were quickly followed by an ambulance as well as three units of the fire brigade from Ennis. Additional units of the fire service from Shannon Town were also mobilised to the incident.
The M18 motorway was closed at junction 14 (Barefield) southbound to junction 12 (Killoo/Clarecastle) was closed for a time. Later, garda motorcyclists escorted small numbers vehicles slowly passed the scene.
There is however no access to the on ramp at junction 13 for traffic travelling towards Shannon and Limerick.
TRAFFIC: There is NO access to the on ramp at J13 (Tulla Road) Ennis for traffic travelling southbound towards Shannon and Limerick. Emergency services remain at the scene of a serious collision.
— The Clare Herald (@theclareherald) June 5, 2018