The Ministry of Foreign Affairs has voiced strong words against terrorists for a pair of suicide bombings that left at least 31 dead in Russia.
MOFA spokesman Luong Thanh Nghi told a press briefing Monday that Vietnam strongly condemned the terror attacks which occurred less than 24 hours apart in the city of Volgograd, formerly known as Stalingrad, in southern Russia.
"We'd like to extend our deepest sympathies to families of the victims as well as the Russian government and people.
"We believe that the terrorists will be strictly punished."
The same day, President Truong Tan Sang sent condolences to his Russian counterpart Vladimir Putin for the deadly attacks.
At least 14 people were killed in a suicide bombing on a trolleybus in Volgograd on Monday morning, BBC reported.
It came a day after 17 people died in another suicide attack at the central station in the city. Scores were injured in the two attacks.
Russian authorities said identical explosives were used in the two attacks, which confirms the theory that the two attacks are linked.
The attacks struck just over a month before the Winter Olympics begin in Sochi - a city in Krasnodar Krai, Russia.
No one has claimed responsibility for either bombing, but they came several months after Chechen rebel leader Doku Umarov threatened new attacks against civilian targets in Russia, including the Olympics, BBC reported.
President Putin has ordered security measures to be tightened across Russia and in particular in Volgograd.