The Cambodian man, identified only as Sakhi, 55, was found dead with another Vietnamese detainee, known as Robat, 77, according to Thailand Foreign Ministry spokeswoman, Busadee Santipitak.
Yu Veasna, a land rights activist from Sihanoukville, said Chinese investors in the area had encroached on the Prek Toub lake in the town, which was the main water source for the local community.
Smith began her latest fact-finding visit to Cambodia on Monday, where she plans to meet with government officials, civil society groups and members of the diplomatic community.
Cambodia and Turkey agreed to increase bilateral trade to $1 billion.
Large numbers of Chinese workers have come to Cambodia to work on projects as China has strengthened its diplomatic and military ties with Beijing which has provided numerous grants and large military aid packages to Cambodia.
In a statement, ASEAN said Phoak was chosen for “providing leadership” and to oversee projects that“focus on forging a common identity and building a caring and sharing society.”
Departing from Cambodia on Tuesday, the long-serving prime minister posted on his Facebook page, saying he would attend the Asia-Europe meeting in Brussels.
The founding editor of Buzzfeed Canada told VOA Khmer that fake news was making it difficult for society to distinguish between fact and fiction.
In an interview with Japan’s Kyodo news last week, Hun Sen said Japan’s “strong economy and political stability” was a “model of real democracy”.