Two deadly terror attacks in two days in Volgograd killed over 30 people and left scores injured.
The prime minister said India "stands resolutely" with the people of Russia in the face of these horrible attacks of terrorism.
"I am outraged and pained to learn about the dastardly terrorist attacks against civilians in the city of Volgograd," read Manmohan Singh's letter.
"On behalf of the people and government of India, and on my personal behalf, please accept our deepest condolences on the loss of lives and injuries in these ghastly attacks. Our prayers go out to the families of all the victims."
"India strongly condemns these terrorist strikes against innocent civilians. These attacks are a grave violation of human rights and an unconscionable crime against humanity. We stand resolutely together with the people of Russia in the face of these horrible acts of terrorism," the letter said.
"Please accept, excellency, the assurances of my highest consideration," Manmohan Singh told Putin.
--IANS (Posted on 30-12-2013)