Dune habitats located next to a stunning cycle path were completely destroyed by fire last night, and police are said to be investigating.
Footage was captured last night of a large area of grassland ablaze near Pembrey cycle path, as firefighters from Llanelli fought the flames.
They were there for well over an hour, using a hose reel jet to bring it under control.
Officers from Dyfed-Powys Police also attended the incident, and are said to have now begun investigations.
A statement from Mid and West Wales Fire and Rescue Service read: "On Wednesday, May 20, at 8.42pm, firefighters from Llanelli attended a grass fire in the Pembrey area.
"The fire was located on the dunes, along a cycle path.
"Firefighters extinguished the fire using a hose reel jet and left the incident at 9.47pm.
"The cause of the fire is being investigated by the police.
"Anybody who may have any information regarding this incident, to assist the police can phone the police on 101 or contact Crimestoppers, anonymously, on 0800 555 111 or via an online anonymous form at https://crimestoppers-uk.org."
Back in April, fire services across Wales were faced with an increase in deliberate grass fires, caused by a mixture of anti-social behaviour, householders burning refuse waste and a number of farmers and landowners torching grassland outside the permitted winter burn dates.
Operation Dawns Glaw, an all-Wales multi-agency taskforce, supported by a range of partners, was launched with the aim of reducing the "uncontrolled environmental destruction and potential threat to lives and property" arising from deliberately set grass fires.
Corporate head of prevention and protection for Mid and West Wales Fire and Rescue Service, and task force lead for Operation Dawns Glaw, Mydrian Harries, said at the time: " It has become very clear to the taskforce over the last few weeks that there is a very small minority of children, young people and adults determined to set fire to land within our communities placing everyone at risk.
"Our emergency services have worked extremely hard to both respond and put out these fires as quickly as possible under the current lockdown situation. This is a wholly unnecessary use of our emergency services during this difficult time ."
Dyfed-Powys Police has been contacted for comment.
