Thongsing would attend the forum Thursday and Friday and thereafter pay an official visit to the kingdom Saturday and Sunday,the Vientiane Times said.
The prime minister's participation at the meeting and his official visit are in response to an invitation from his Thai counterpart, Yingluck Shinawatra.
Hundreds of business leaders and policy makers were expected to attend the regional economic forum, including Myanmar democracyc ampaigner and Nobel Peace Prize winner Aung San Suu Kyi.//DPA