TAIPEI – Rescuers were battling to free more than 100 people trapped in a collapsed building in the southern Taiwanese city of Tainan following a strong 6.4-magnitude earthquake that struck the island on Saturday morning. Dramatic footage on local television and social media showed one crumbled building that had fallen onto its side and another lurching dramatically after the quake. Formosa TV reported that there were 150 trapped in one 16-storey building with those inside crying for help. Officials said that 69 had been rescued, but could not confirm how many were trapped inside. At least 30 people have been rescued from another residential seven-storey block that collapsed, with no fatalities so far. “Four buildings have collapsed in Tainan City area. Search and rescue is under way and no casualties have been reported at this moment,” National Fire Agency Lin spokesperson Kuan-cheng told AFP.