Salvage teams began removing pulverized train carriages on Saturday after Taiwan's worst rail disaster in decades plunged the island into mourning.
Prosecutors said they are seeking an arrest warrant for the construction site manager who may have failed to secure the parking break, state-run Central News Agency reported on Saturday.
The train was carrying almost 500 people and was traveling from the capital Taipei east of Taitung when it derailed in a tunnel just north of Hualien, which also lies along the east coast of Taiwan. With much of the train stuck inside the tunnel, some survivors were forced to climb out of windows and walk along the train's roof to safety.
Rescue workers remove a part of the derailed train.
Lee had been released on bail, though the high court's Hualien branch on Sunday rescinded that decision after the prosecutors appealed it, sending the case back to the lower court.
"This heartbreaking accident caused many injuries and deaths".
Xi sent his honest condolences to the families of the deceased and expressed sympathy for the injured and wished them a speedy recovery. "We will surely help them in the aftermath".
"We will definitely determine the cause of this accident, which claimed the lives of a large number of victims", she told reporters.
Speaking at the crash site overlooking the ocean and backed by precipitous mountains, Lin Chia-lung said he would "not avoid" responsibility.
Taiwan's transport ministry said two USA citizens were among the dead, while two Japanese, an Australian and a Chinese citizen were among the injured.
Fix work also has begun on the tracks including the tunnel where part of the eight-car train crashed.
However, a third could not be moved before the tracks are repaired while the other five cars were still wedged into the tunnel.
Deputy transport minister Wang Kwo-tsai said late on Saturday the railway administration needed to take hard look at all these issues. The government's disaster response centre said it was the worst rail disaster in 73 years. The train was packed with tourists and residents going home for the traditional Tomb Sweeping Day to clean the graves of ancestors.
In this photo released by the Taiwan Presidential Office, Taiwan President Tsai Ing-wen offers joss sticks at a memorial for victims of Friday's train derailment in Hualien, eastern Taiwan. The lightly populated east where the crash happened is popular as a tourist destination, and the railway line is known for its attractive natural scenery.