Police said that the suspect, surnamed Wu (吳), was captured on surveillance cameras on Thursday night as he approached the building on foot and allegedly placed an improvised explosive device next to the building’s main entrance. On Friday evening, the Criminal Investigation Bureau and the Kaohsiung City Police Department traced the man to a fourth-floor apartment on Yongle Street in Lingya District (苓雅), police said. Wu, who is in his late 40s, was renting an apartment in Kaohsiung and the Yongle Street residence where he was arrested belonged to a friend, prosecutors said. After treatment, he is to be questioned as prosecutors seek details about his professional background and possible motives, Lin said. Residents in homes near the Yongle Street standoff said they had been afraid to sleep, as they could hear the police and Wu trading gunfire.