At least nine people have been arrested in connection with the collapse of what Xinhua has described as a "self-built building" on suspicion of ignoring building codes or committing other violations. Varying reports have said the building was either six or eight stories tall. The 10th survivor, an unidentified woman, was pulled out shortly after midnight on Thursday, nearly six days after the building suddenly caved in on April 29, Xinhua said. Rescue teams with search dogs have been searching through the rubble since then.