Thailand's main opposition is leading the ruling military junta's party in national elections, but no clear-cut winner has been determined from Sunday's vote, amid confusion and complaints of voting irregularities. With more election results still to be announced, both of the leading parties say they're working to form Thailand's next government.

The Pheu Thai party — which was ousted in 2014, shortly before the military seized power in a coup — says it's looking to form a coalition on the strength of winning more than 135 constituency seats out of 350 total. That's compared to the junta-backed Phalang Pracharat's nearly 100 seats.

"A political newcomer, the anti-junta Future Forward Party finished strongly as well," NPR's Michael Sullivan reports for our Newscast unit. "The Election Commission says it will announce results for 150 party list seats on Friday. Pheu Thai's leadership says it will try to form a coalition government that could include Future Forward and others. But the military-backed party will try, too."

The results, while still in flux, could leave the junta in power despite not having a majority coalition in the lower house. As Sullivan reports, Prayuth Chan-ocha the Thai coup-leader-turned prime minister, could easily keep his job, in part because the junta appoints the entire Senate — bringing 250 votes to bear in selecting the prime minister.

Thailand's Election Commission released the latest unofficial tally Monday afternoon, following repeated delays and confusion over the results. The agency says an official tally won't emerge until early May, according to the Bangkok Post. Sudarat Keyuraphan, Pheu Thai's prime minister candidate, said on Monday that her party is working to form a governing coalition.