A ceremony was held at the Democracy Monument on Ratchadamnern Avenue on Sunday to mark the 40th anniversary of the October 14, 1973 students uprising.
The memorial, which began early Sunday morning with a religious ceremony, was attended by relatives of those who were killed in the incident and a number of politicians who were involved in it at the time.
They included Interior Minister Charupong Ruangsuwan, Education Minister Chaturong Chaisaeng, Sunai Jullapongsathorn, Wiphuthalaeng Pattanaphumthai, Weng Tojirakarn and Kokaew Pikulthong.
Former prime minister Thaksin Shinawatra and Prime Minister Yingluck Shinawatra sent wreaths to commemorate the event.
In the afternoon, a column of people will march from the Democracy Memorial along Ratchadamnoen Avenue to Thammasat University where activities will be held throughout the day.
An opinion survey conducted by Suan Dusit Poll shows that 82.72% of the respondents know about the October 14, 1973 students uprising and regard it as an important event in Thai history which has been taken as a lesson for the country.
The poll was conducted on 1,408 people throughout the country.