The collision involving a silver BMW and a black Peugeot 208 happened around 10.50pm last night (Wednesday 2 April).
Police say the driver of the BMW died following the accident. The Peugeot driver is in a critical condition in hospital.
The busy A4138, which connects Llanelli with the M4 at Hendy, was closed for around 10 hours while accident investigators were on the scene.
Police are now appealing for anyone who witnessed the accident or who may have dashcam footage to get in touch.
A spokesperson for Dyfed Powys Police said: “We are appealing for information about a fatal collision on the A4138 between the Llangennech roundabout and the Llanelli Crematorium roundabout, Carmarthenshire, which occurred at round 10.50pm on Wednesday, April 2.
“The collision involved a silver BMW and a black Peugeot 208.
“Sadly, the driver of the BMW died as a result of their injuries. Their next of kin has been informed.
“The driver of the Peugeot remains in hospital in a critical condition.
“The road was closed for collision investigation and was reopened by 8.45am today (April 3)
“Anyone who may have been travelling along the A4138 at the time, is asked to contact police.
“Investigating officers would particularly like to speak to any motorists who were in the area at that time who have dash cam in their vehicles.”
(Lead image: Google maps)
