"Some ill-intentioned people might use the march as a pretext to attack the courts," PAD spokesman Suriyasai Katasila said.

The Caravan of the Poor responded by calling off its planned rally for the Election Commission at the agency's head office.

Katasila said people could express their appreciation of the judiciary's effort to sort out the political mess in other ways, such as mailing postcards of encouragement addressed to the Supreme Court.

Judge Jaran Pakdithanakul earlier urged the PAD to review its decision to organise the march since it could send out the wrong signal about the judiciary's integrity in dealing with the country's political problems.

The top three courts have called for the election commissioners to step aside so the judiciary can act to restore public trust in the electoral process. PAD's march against the EC was seen as unwarranted and counterproductive.

PAD said it would host a public forum in Bangkok on June 24 to solicit ideas for political reform, with some 2,000 people expected to attend the gathering.

Atthawit Singlor, leader of the Caravan of the Poor, said his group had planned to advance to Bangkok to back up the EC and also push for caretaker Prime Minister Thaksin Shinawatra to be the premier.

But when PAD decided to refrain from mass activities the caravan should follow, he said.

"We thought we'd wait and watch the situation, while we don't want people to misunderstand us that we will be making trouble during the celebration of His Majesty the King's 60 years on the throne," he said.

Should Thaksin decide to run for the next election, however, we would move to Bangkok to cheer him on, he added.