One group, however, marched towards the police headquarters for a rally. But officials said they were not worried.
"Their movement today is merely to display their power and show that the protests are still continuing," Paradorn Pattanatabut, head of the National Security Council, told Agence-France Presse news agency.
There have been no reports of violence or tear gas so far, says the BBC's Jonah Fisher in Bangkok. But our correspondent adds that increasingly this feels like a pause and not an ending to the protests.