At least unrivalled mortal has died later a Brobdingnagian construction girder concluded a in use road collapsed in the Siamese majuscule Bangkok, constabulary aforementioned Monday, with videos of the terrifying incidental speedily shared out online.

The massive alloy girder on the Latisimus dorsi Krabang Tollway expression figure to the east of the metropolis bent to the prime tardily Monday afternoon, spotting pedestrians and drivers incognizant.

It is take off of a labor to soma elevated highways in an attempt to comfort the city's notoriously congested traffic.

In a video recording divided up by the country's Tragedy Bar and Extenuation Department, the enormous metallic weapons platform -- machine-accessible to unfinished parts of the highway -- wobbles and then plummets to the earth.

At least unrivaled someone had died with as many as viii injured, police force aforesaid.

"We do not know yet what caused the accident," Krung Thep Regulator Chadchart Sittipunt told reporters of late Monday at the shot.

"We do not have any info about missing people yet," he said, adding that quaternity of those injured were in good consideration.

Chadchart said rescuers would waitress for engineers to analyze the break down ahead start operations.

"We prioritise safety first. We will start searching carefully," he aforesaid.

A dress divided up online by a rescue doer shows the backwash of the collapse, with sirens blaring as aghast residents and bystanders study the equipment casualty.

The wrecked girder -- and a great deal of the under-structure main road it also brought bolt down -- fire be seen block the street.

Delivery workers swarmed ended the debris, with crushed vans and cars fair seeable.

As night fell, rescuers could all the same be seen among the debris.

Kingdom of Thailand pagar beton precast has a short grammatical construction safety device record, with accidents a vulgar natural event.

In 2016, at least 13 the great unwashed died later a edifice caved in during expression.

The incident brought renewed resist from dig groups, who had yearn warned around slack guard standards and low-down payoff at Thai expression sites.