Red-shirt co-leader and Pheu Thai Party list MP Weng Tojirakan on Wednesday submitted a petition asking Justice Minister Pracha Promnok to empower the International Criminal Court (ICC) to launch an enquiry into the government's use of force to suppress red-shirt protesters in April-May 2010.
He said the the government of the time's action resulted in the death and injury of a large number of people.
In the petition, Mr Weng asked Pol Gen Pracha to recognise the ICC's jurisdiction to probe the bloodshed by notifying the court's registrar of the intention.
Mr Weng, a core member of the United Front for Democracy against Dictatorship (UDD), said it was a pity that the Democrat Party has a plan to ask the ICC to investigate the deaths of some 2,500 people in the "war on drugs" during the administration of former prime minister Thaksin Shinawatra.
He wondered why the Democrat Party had not done so while leading a government for two years and eight months.
Pol Gen Pracha said the Justice Ministry would accept the petition for consideration, which would be based on the law.
The matter would also be reported to Prime Minister Yingluck Shinawatra, he said.