The two were among dozens of dissidents opposing the 2014 military coup and went missing in recent years.
The announcement for the date of Thailand‘s election came as two bodies of anti-government activists were found in the Mekong River.
They were among dozens of dissidents who fled the country after the coup.
At least two other critics have gone missing from Laos in recent years, leading to the accusation from dissidents living outside Thailand that this was the work of the military.
Al Jazeera’s Wayne Hay reports from Bangkok.