Singaporean Ministry of Foreign Affairs spokesman, in response to media queries on the attacks at the Kunming train station, strongly condemned the violent attacks and expressed deepest condolences to the victims and their families and wish those injured a quick recovery.

"Such attacks on innocent civilians cannot be pardoned or justified under any circumstances," said the spokesman.

Cambodia on Monday condemned the chilling attack and backed China's measures to crackdown on all forms of terrorist activities, said a statement released by the country's Ministry of Foreign Affairs.

In a statement issued on Monday, the Hungarian Foreign Ministry said it condemned all forms of terrorism and deemed all violent acts targeting innocent civilians unacceptable.

Indian External Affairs Ministry also issued a statement on Monday, condemning the March 1 terror attack in Kunming.

"New Delhi opposes terrorism in all its forms and manifestations," the statement said.

President of Kazakhstan Nursultan Nazarbayev also extended his condolences on Monday in a message to his Chinese counterpart Xi Jinping, according to the country's presidential press office.

"I want to emphasize that there are no excuses for crimes against humanity," Nazarbayev said in his message. "The international community must work together to neutralize these threats."

At the opening of the annual session of the National Committee of the Chinese People's Political Consultative Conference (CPPCC) on Monday, Chinese leaders and political advisors paid silent tribute to the victims of the incident.

"The CPPCC supports the law enforcement departments to crack down on all violent, terrorist and criminal activities in accordance with law," said Du Qinglin, vice chairman of the CPPCC National Committee.

Chinese police said on Monday three suspects involved in the terror attack had been captured.

The Ministry of Public Security said the terrorist gang led by Abdurehim Kurban was responsible for the attack.

The health authorities said 20 of the 143 injured in the attack were still in critical condition.