The Pheu Thai Party has yet to nominate its candidate to run for the Bangkok governor election next year, Prime Minister Yingluck Shinawatra says.
The nomination was not being considered as Pheu Thai does not yet know the date for of the election, Ms Yingluck said yesterday.
The choice would be based on a party resolution.
Khunying Sudarat Keyuraphan, a former executive of the dissolved Thai Rak Thai Party, has been widely discussed as a favourite for the party's nomination.
A group of 30 pro-government red shirts yesterday called on the Pheu Thai Party to field Khunying Sudarat as its candidate.
The group went to the party's headquarters to hand a letter to Ms Yingluck and party leader Charupong Ruangsuwan, urging them to field Khunying Sudarat.
The group said it was confident the veteran politician could defeat any candidate put up by the rival Democrat Party.
Another figure tipped for nomination is deputy national police chief Pongsapat Pongcharoen, who also serves as secretary-general of the Office of the Narcotics Control Board.
A party source said many red-shirt members in Bangkok would oppose the party fielding the police deputy, as he is regarded as having less knowledge about Bangkok's problems.
The red shirts were ready to help campaign if the party picked Khunying Sudarat as its candidate instead, the source said.