TAIPEI (REUTERS) – A powerful earthquake toppled a 17-storey apartment building in southern Tainan on Saturday (Feb 6), and crews had so far rescued 123 people from the wreckage, a fire brigade official said. There were no immediate reports of deaths from the 6.4 magnitude tremor, which struck before dawn. "There are 60 households in that building," said Tainan City Government Fire Bureau information officer Lee Po Min, estimating that there might be about 240 people living there. At least five aftershocks of 3.8-magnitude or more shook Tainan about half an hour after the initial quake, according to Taiwan’s Central Weather Bureau. Taiwan’s Formosa TV showed images of police, firefighters and some troops in camouflage uniforms at the site of a collapsed residential building and said its reporters could hear the cries of some residents trapped inside. Video: Building collap...