Nine fire crews from different stations battled a huge blaze in Lampeter on Sunday morning.
Mid and West Wales Fire and Rescue Service were called to Lampeter Industrial Estate at around 10am, where a commercial garage building was on fire.
The 10m x 10m building was alight on the arrival of crews from Lampeter, Tregaron, Aberaeron, Llandysul, Tumble, Llandovery, Carmarthen, Llanelli and Llandeilo, as well as a number of vehicles inside the garage.
There were also more than 70 propane cylinders alight.
Fire crews said they believed the fire to have been caused accidentally.
A spokesperson for Mid and West Wales Fire and Rescue Service said: "One commercial garage building measuring approximately 10m x 10m was heavily involved in the fire, and numerous vehicles inside and outside the garage were alight, as well as over 70 propane cylinders.
"Crews tackled the fire using three ground monitors, three high pressure hose reels, thermal imaging cameras and one breathing apparatus set. Crews proceeded to dampen down and monitored temperatures.
"The cause of the fire is believed to be accidental. Crews left the scene at 1.39pm."
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