Clouds of black smoke were visible for many kilometers from the towers. (Image: dantri.com.vn)
The nearly completed twin towers, one 29 and the other 33 storeys, were quickly smothered in thick black smoke as the fire started in the basement of the 33-storey building and flames and smoke rapidly spread to the upper floors.
Around 40 workers trapped in the towers had to race to the top floor to wait for firefighters and rescuers.
Dozens of fire trucks along with hundreds of firefighters, policemen, and soldiers were mobilised at the scene.
The blaze was completely put out by 8.50pm and everyone trapped in the towers was rescued safely. Twenty four people suffering from smoke inhalation and light burns were taken to hospital, but no deaths have been reported.
The police are investigating the cause of the blaze.