Thailand's ruling junta took an unexpected lead in the country's first election since a 2014 coup with more than 90 percent of ballots counted, putting it on course to return to power at the expense of the kingdom's pro-democracy camp.

Sunday's election was held under new laws written by the military to smooth its transformation into a civilian government. While it had set the rules of the game in its favour, analysts had not expected the party to win the popular vote, given mounting anger at junta rule and due to the enduring popularity of Pheu Thai, the party of ex-premier Thaksin Shinawatra.