REUTERS/Pichi Chuang
The quake struck at about 4 a.m. on Saturday (3.00 p.m. ET on Friday) at the beginning of the Lunar New Year holiday, with almost all the dead found in Tainan's toppled Wei-guan Golden Dragon Building. Two others died elsewhere in the city.
Rescue efforts, increasingly becoming a recovery operation, have focused on the wreckage of the 17-storey building, where more than 100 people are listed as missing and are suspected to be buried deep under the rubble.
Questions have been raised about the building's construction quality, especially materials used to build it.
Liu Shih-chung, Tainan city government deputy secretary general, said an arrest warrant had been issued for Lin Ming-hui, the Wei-guan Golden Dragon Building's developer, and two others.
Ming-hui had "a checkered business history," according to The New York Times, and has disappeared since the building collapse.
Reuters witnesses at the scene of the collapse have seen large rectangular, commercial cans of cooking-oil packed inside wall cavities exposed by the damage, apparently having been used as building material.
Taiwan media has also reported the presence of polystyrene in supporting beams, mixed in with concrete.
(Reporting by J.R. Wu, and Faith Hung in TAIPEI; Writing by Ben Blanchard; Editing by Lincoln Feast)