Hundreds of Thai workers gathered in Bangkok Tuesday morning to mark Labor Day and submitted petition to the premier, demanding an improved standard of living, according to local media.

Workers from 13 labor organization members in the Employees Council of Thailand and two state enterprise labor unions attended a religious ceremony held at the Royal Plaza, chaired by Minister of Labor Phadermchai Sasomsab.

After the ceremony, the group marched to Sanam Luang where the main event will be held to mark both the international and Thai national Labor Day.

Jaiyaporn Chantana, chairman of Labor Congress Freedom of Thailand (LCFT), who also chaired the organizing committee for the Labor Day celebrations, said that the labor group this year submitted a nine-point petition to Prime Minister Yingluck Shinawatra who presided at the opening ceremony at Tuesday noon.

The petition included a demand that the government speed up Thailand's process of adopting the International Labor Organization (ILO) Convention on Freedom of Association and Protection of the Right to Organise, to establish an unemployment insurance fund, and to set up an institute to ensure safety, occupational health and environment in the workplace.

Meanwhile, another group of workers called the Thai Labor Solidarity Committee and State Enterprise Labor Relations gathered outside Parliament before marching to the Democracy Monument.