TEHRAN, Young Journalists Club (YJC) - However, the opposition alliance would still fall short of being able to elect a prime minister.
Under parliamentary rules, written by the ruling military junta, the party or coalition picking a prime minister requires a majority in the combined upper and lower houses of parliament.
With unofficial results of Sunday's vote still delayed, the ruling junta showed no sign giving up on its goal to keep former army chief and coup leader Prayuth Chan-ocha in the premiership.
The post-election standoff could raise tensions just as the Southeast Asian country prepares for the elaborate coronation of its new king in May.
Sudarat Keyuraphan, the main prime ministerial candidate of the Pheu Thai party ousted by the 2014 army coup, told reporters the seven parties in the opposition alliance would take at least 255 seats in the 500-member House of Representatives.
"We declare that the democratic front who opposes military rule commands the majority in the House," Sudarat said.
She said the largest alliance in the lower house should be given the right to try to form a government.
"Parties in the democratic front gained the most trust from the people," Sudarat told reporters, adding that they were also in talks with other parties.
The pro-military Palang Pracharat party has also claimed the right to form the next government based on its early lead in the popular vote. And an official with the pro-army party also said it could still win a majority as the count was still in flux.
"We got the most popular votes. Almost 8 million wanted to see Prayuth as prime minister," Thanakorn Wangboonkongchana, Palang Pracharat's deputy spokesman, told reporters.
Source: Reuters