At least one of the demonstrators held up a white t-shirt emblazoned with a bird that had its beak and feet bound during the small gathering near the capital's Victory Monument.
Thailand's generals have banned political gatherings of more than five people under martial law, imposed two days before they grabbed power from an elected government last May.
Today's rally was staged by members of a group called Serichon (Freeman) Thailand 58, which handed out a statement during the event claiming they were not gathered in protest.
The group did not detail what ideas it hoped to discuss but called for a broader forum than the reform council put in place by the military after the coup to work on initiatives such as combatting corruption.
The junta says it will hold fresh elections in early 2016 once reforms including tackling corruption and curbing the power of political parties are codified in a new constitution.
Protesters have been arrested for handing out copies of George Orwell's anti-authoritarian novel "1984" or flashing the three-fingered salute from the Hollywood franchise "The Hunger Games" -- both acts that have become unofficial forms of opposition to the regime.
Three people were taken into police custody after the gathering, police Colonel Vichai Dangprakob said.
"It is not an arrest, we have just invited them to talk for attitude adjustment. No charges have been pressed yet," he said.
The junta insist the summons are simply invites -- though in reality any refusal to cooperate would likely lead to significant censure.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
