A pro-military political party in Thailand has taken an unexpected lead in the country's first election since the army took power five years ago.
With more than 90% of ballots counted, the Palang Pracha Rath Party has gained 7.6m of the popular vote - half a million more than Pheu Thai.
Pheu Thai is linked to former PM Thaksin Shinawatra, whose loyalists have won every election since 2001.
Official preliminary results, which may differ, are due later on Monday.
The electoral commission has said full official results will be issued on 9 May.
More than 50 million people were eligible to vote, but turnout was reportedly low for Thailand at just 65%.
There are growing complaints about irregularities and reports suggest the electoral commission may issue a correction to its figures later on.
However it is looking likely that the Palang Pracha Rath Party (PPRP) will be in a position to form a government under the current leader, General Prayuth Chan-ocha, who led the coup that ousted Mr Thaksin's sister, Yingluck Shinawatra, in 2014.
What are the results so far?
Preliminary results indicate that Pheu Thai (For Thais) has won the most seats in the lower house out of 350 being elected. A further 150 seats will be allocated under a complicated formula according to each party's share of the national vote.
Because of the way the voting system has been restructured by the military government, it appears Pheu Thai is unlikely to be able to form a government.
Other key developments:
The Democrat Party, Thailand's oldest political party, performed poorly, with leader Abhisit Vejjajiva, who was prime minister from 2008 to 2011, stepping down to "take responsibility".The brand new Future Forward Party, led by billionaire Thanathorn Juangroongruangkit, did surprisingly well and could be Thailand's third-biggest party.
Analysis by Nick Beake in Bangkok
Many in Thailand are scratching their heads after a new, pro-junta party - predicted to finish a distance third place - apparently managed to win the popular vote.
At the Election Commission HQ, activists and reporters are asking questions. Why was turnout so low? Why were so many votes discounted? And specific concerns are being raised, for example, why did 1,500 votes cast in New Zealand never make it to a count?
For many, it simply doesn't add up.
A surreal moment came when one prominent activist, Sombat Boonngamaong turned up as a pirate - for reasons which weren't obviously clear - and produced a giant calculator as a gift for the president of the election commission. The official raised eyebrows last night when he abruptly ended the announcement of the ballot results because, he quipped, he didn't have a calculator.
It's hard at this stage to determine whether alleged irregularities affected the outcome.
General Prayuth's ruling junta may have reshaped the electoral system to keep themselves in power, but on-the-day polling in Thailand has been viewed as pretty fair in the past.
But unexpected events this time round are prompting angry allegations of incompetence, inconsistencies and at worst corruption.