<p>One of the activists demanding an investigation into Rajabhakti Park has reportedly been taken and held incommunicado by the Thai authorities.</p> <p>Chatmongkon Wanli, a 21-year-old activist, who was earlier forced to sign a memorandum of understanding (MoU) promising not take part in any political activity, posted a message on his Facebook page on Sunday, 21 December 2015, that his fellow activist has been missing for three days.</p>