- 27 updates
Russian President Vladimir Putin has visited survivors of the recent suicide bomb attacks that took place in the city of Volgograd.
Putin's visit to the hospital comes after he vowed to "fiercely and consistently continue the fight against terrorists until their complete annihilation".
Russia's President Vladimir Putin has vowed to "fiercely and consistently continue the fight against terrorists until their complete annihilation," the Interfax news agency reported.
He was speaking for the first time since at last 34 people were killed and wounded in twin suicide bombings in the southerncity of Volgograd.
The International Olympic Committee (IOC) said it is confident the Russian authorities can delivers a "safe and secure" Winter Olympics in Sochi after a second suicide attack on the city of Volgograd.
IOC president Thomas Bach said: "This is a despicable attack on innocent people and the entire Olympic movement joins me in utterly condemning this cowardly act. Our thoughts are with the loved ones of the victims.
"I have personally written to the president of the Russian Federation, Vladimir Putin, to express our condolences to the Russian people and our confidence in the Russian authorities to deliver safe and secure Games in Sochi.
"I am certain that everything will be done to ensure the security of the athletes and all the participants of the Olympic Games."
British Olympic chiefs are monitoring the safety and security situation in Russia after a second suicide bomb hit the city of Volgograd, killing at least 14 people.
The suicide bombing on a bus came a day after 17 people died in another suicide attack at the central station in the city.
With the Winter Olympics in Sochi, about 400 miles from Volgograd, due to open on February 7, the British Olympic Association described the terror attacks as "a painful reminder of the threats that exist in our world today".
"As with every Olympic Games - winter and summer - it is the responsibility of security officials at the national level, working in close coordination with regional and local authorities and the Games Organising Committee, to ensure that the environment is as safe and secure as possible," it said.
A second suicide bomber has struck in the Russian city of Volgograd, killing at least 14 people.
The target was a bus - packed with commuters - in the morning rush-hour.
On Sunday, 17 people were killed by an explosion at the city's train station. Security is now a major concern, with the Russia's Winter Olympics just six weeks away.
ITV News Correspondent Neil Connery reports:
David Cameron has tweeted his shock at the suicide bombings in Russia, which have claimed at least 31 lives.
Russia has called for international solidarity in the fight against "terrorists" after two deadly suicide bombings in the southern city of Volgograd.
In a statement, the Foreign Ministry said: "We will not retreat and will continue our consistent fight against an insidious enemy that can only be defeated together."
It did not place direct blame on any particular group for the attacks but said they came against a backdrop of threats from militants.
They include Doku Umarov, leader of an Islamist insurgency in the North Caucasus who has called on fighters to prevent Russia holding the Winter Olympics in February.
Russian President Vladimir Putin has ordered the country's counter-terrorism agency to step up security in the city of Volgograd and nationwide after two bomb attacks, the Kremlin said.
The Russian city of Volgograd where at least 31 people have been killed after two suspected suicide bombing attacks is about 400 miles northeast of Sochi, where the Olympics are to be held in February.
At least 14 people were killed in an explosion on a trolleybus earlier today, a day after a blast killed at least 17 at the city's main railway station.
At least 14 people have been killed after an explosion on a trolleybus in the Russian city of Volgograd, Reuters reports.
Russian investigators believe a male suicide bomber carried out the attack which comes a day after a suicide bomb attack on the city's train station killed 17.