Taiwan Mourns After Deadly Train Disaster

Grieving relatives of those who died in Taiwan's worst rail disaster in decades held prayers at the crash site on Saturday as salvage crews worked to remove the tangled mass of wrecked carriages.

Officials said Friday's devastating collision, which killed at least 50 people and injured more than 170, was caused when a parked railway maintenance vehicle slipped down an embankment and onto the tracks.

A train packed with as many as 500 people at the start of a long holiday weekend then hit the truck just as it entered a narrow tunnel near the eastern coastal city of Hualien.

The truck driver – who railway officials said may have failed to secure the parking brake properly – has been released on bail after being interrogated by prosecutors and is barred from leaving Taiwan pending further investigation.

Around one hundred relatives held an emotional Taoist prayer ceremony near the crash site on Saturday afternoon, shaded under a canopy of black umbrellas.

Many wept openly as they surveyed the scene, some holding makeshift shrines inscribed with the names of those who died.

Some called out the names of their loved ones as other family members held them tight.

Rescuers described an appalling scene as they rushed into the tunnel and found the front of the train pulverised into a twisted mesh of metal.

"Car number eight had the most serious injuries and number of deaths," rescue worker Chang Zi-chen told reporters on Saturday, referring to the most forward passenger car.

"Basically more than half of the carriage was split open and bodies were all piled up together."

Specialist teams spent hours extracting victims and survivors on Friday.

On Saturday, focus shifted to removing carriages now blocking one half of the sole train line down Taiwan's remote and mountainous eastern coastline.

Two giant cranes were being used to move the carriages and rescuers said further bodies might still be found inside the most damaged cars inside the tunnel.

The Interior Ministry ordered all flags to be lowered to half-mast for three days while President Tsai Ing-wen visited the wounded in Hualien's hospitals.

"Government agencies are making an all-out effort in the hope of minimising the impact of the disaster so the deceased can rest in peace and the injured can recover soon," she told reporters.

Investigators are focusing on how the maintenance truck could have slipped onto the tracks.

The driver was part of a team that conducts regular landslide checks on the mountainous route.

Officials said he may have failed to properly engage the parking brake. (AFP)