A wooden bridge in Kanchanaburi, the longest of its kind in Thailand, was saved from fire on Sunday night when passers-by spotted smoke and alerted the authorities.
Two Kanchanaburi Forest Protection Foundation volunteers were crossing Uttamanusorn Bridge over the Galia River at 9.30pm and saw smoke billowing from a wooden pillar.
They called the Sangklaburi police station, whose officers arrived with soldiers and put out the fire in just 15 minutes.
Police suspect someone tossed aside a cigarette butt and it landed against the wood.
During floods in July 2013, a large tree swept along by the river current smashed through the bridge at the centre.
Kanchanaburi provincial administration had a private firm begin repairs, but the job was left incomplete until October the following year, when the Army’s Ninth Infantry Division helped residents finish the repairs in just 29 days.