Red-shirt opponents of the government's blanket amnesty bill on Tuesday announced plans to stage a mass rally on Nov 10 to oppose the legislation.
Sombat Boongam-anong, 46, leader of the Red Sunday Group, said the plan to stage a protest was agreed after a meeting of red-shirt activists against the blanket amnesty bill.
Their decision came on the same day as the ruling Pheu Thai Party passed a resolution stating that all its MPs should vote in favour of the amnesty bill.
The House meeting to deliberate the legislation in its second reading is scheduled to be held from Oct 31 until Nov 1. The House will vote on the bill in its third reading on Nov 2.
Mr Sombat admitted activists may not have enough time to mobilise people against the blanket amnesty if the House votes on the bill's third reading on Saturday. However, he said he still expected the anti-amnesty gathering next Sunday to draw more than 10,000 people.
On Sunday, Mr Sombat led about 200 red-shirt activists to gather at Ratchaprasong intersection to express dissatisfaction over the "twisted amendment" to the bill that would effectively exonerate former premier Abhisit Vejjajiva and his deputy Suthep Thaugsuban over the bloody crackdowns in 2010, while also allowing former prime minister Thaksin Shinawatra to return to the country.
If the revised amnesty bill is passed into law, Mr Sombat said it will set a precedent for sparing politicians involved in political violence from punishment.