Five cars were damaged when workers laying new drainage pipes behind a Pattaya mall snagged overhead power lines.
Witness Suratsawadee Samangjit, 35, said a backhoe working to lay new pipes carelessly hit snagged power and communications lines on Soi 15 behind The Avenue galleria, tearing the live wires to the ground.
The wires set off a fire that spread to two Toyota Yaris cars, a Honda HRV, Toyota Altis and Honda Civic. No one was injured.
Firefighters arrived to extinguish the blaze that spread over 200 meters of wires.