The search continues About 20 Thai and Lao activists gather in Bangkok to call on Lao authorities to speed up their probe into the disappearance of prominent Lao activist Sombath Somphone. Mr Sombath, 60, is believed to be in state custody after police CCTV footage showed him being detained by police in Vientiane this month. CHANAT KATANYU   Published caption : A group of about 20 activists from Thailand and Laos gather in Bangkok to call on authorities in Bangkok to call on authorities in Vientiane to speed up their investigation into the disappearance of Sombath Somphone.