Suthin Klangsaeng, the party's caretaker spokesman, said his team strongly believed another coup was on the cards, citing three main indicators.

The first is the growing conflict between the government and the Council for National Security (CNS) and the political movement of some groups, especially the People's Alliance for Democracy (PAD).

Second, some media have been supporting or trying to create conditions - by citing recent protests - that make another coup necessary.

Third, there have been attempts to change the prime minister and topple the government.

Suthin said the Thai Rai Thai strongly disapproved of any attempt at another coup, believing it would create "detrimental damage" to the country. It will gather the signatures of people across the country to oppose the idea.

"The Thai Rak Thai Party will exert all efforts to fight against any coup attempts, by resorting to peaceful and democratic methods. The party believes the political problems can be solved by using an interim constitution, and the election must be held as the government has promised," he said.

Nisit Sinthuprai, a former Thai Rak Thai MP, said the party would campaign in every tambon and village for people to join it in lodging complaints against potential coup-makers.

Chaturon Chaisang, the party leader, supports the plan.

"We believe this will provide stronger immunity for democracy against a coup," he said.

PTV deputy chairman Chatuporn Prompan said he believed Thai Rak Thai coup theory because CNS deputy secretary-general Saprang Kalayanamitr has made noises about another coup for eight months.

The PAD has also staged a political campaign in the provinces over the past two months "without sound reasons", he said.

Chatuporn suspects the PAD wants to support a coup so that the coup-makers can use protests as an excuse to prevent confrontation, as they did in staging the September 19 takeover last year.