BANGKOK, May 4 (Xinhua) -- Representatives from 21 private and public organizations rallied in a Bangkok park Monday morning, calling for Thai political groups to stop violence that hurts Thailand, Thai media reported.

    According to Bangkok Post's website, some citizens as well as senate speaker Prasopsuk Boondej, other senators and Thai Journalists Association secretary-general Pradit Ruangdit joined the rally, which was held at the Lumpini Park and then marched on the Silom Road, a major business street in Bangkok, before dispersing.

    The crowd held banners saying "Stop Using Violence," and popular musicians led by singer Yuenyong Opakul, known as Aad Carabao, sang "Stop Hurting the Country".

    Prime Minister's Office Minister Sathit Wongnongtoey and United Front for Democracy against Dictatorship (UDD) core members were also present, Bangkok Post said.

    The rally came as Thai government is trying to mitigate the political unrest through amendment of the Constitution as well as an amnesty to banned politicians, though the idea faced opposition of the People's Alliance for Democracy (PAD), a major political group.

    Parliament has set up two committees to study constitutional amendments and to investigate the mid-April riots caused by red-shirted UDD members. The panels will set the scene for the entire process of political reform and reconciliation, as suggested by Prime Minister Abhisit Vejjajiva.

    The anti-government UDD's mass rally started on March 26 turned violent from April 11, when a flock of red-shirts rushed into the venue of then-ongoing 14th ASEAN Summit and Related summits, aiming to force Abhisit to step down. The summits had to be cancelled abruptly.

    The conflict between UDD supporters and security forces as well as Bangkok residents was heated up during the following couple of days, leaving more than 120 people injured and 2 dead in the clashes.