Thailand's Prime Minister Paetongtarn Shinawatra visits the collapsed building site in Bangkok as a search and rescue operation continues. Tavida Kamolvej, the deputy governor of Bangkok, raised hopes over a noise or movement in the rubble that could be a survivor but cautioned that the situation was still extremely unclear, and they needed "a quiet moment" to work out its origin. At least 18 people have been killed in Bangkok after Friday's 7.7-magnitude quake, city authorities said Sunday, with 33 injured and 78 still missing. Most of the deaths were workers killed in the 30-storey tower collapse, while most of the missing are believed to be trapped among the debris. IMAGES AND SOUNDBITES