The Russian President has stressed that Russia is ready to help out the US in its investigation of the deadly twin blast that hit the Boston Marathon on Monday, the Kremlin said.
A powerful explosion erupted near the finish line while the race was still in progress, killing three and wounding 144, at least 17 of them critically.
“Mr. Putin has strongly condemned this barbaric act of violence and called for a coordinated effort of the international community in its struggle against terrorism,” the Kremlin press office reported.
The Russian Embassy to the US has tweeted on its microblog that no Russians have been injured in Monday’s twin blasts in Boston.
The two explosions went off within 12 seconds of each other near the Boston international marathon finish line on Monday, with three people reported dead. According to the latest reports, the number of injured has reached 183, the condition of 23 of them is said to be critical.
The FBI has said it is still unaware of who may be suspected of the attacks.
An interfaith service in remembrance of the dead is due at the Boston Cathedral on Thursday, with President Barack Obama expected to address the attendees.
Police investigating the deadly blasts at the Boston Marathon said on Tuesday they had recovered fragments of black nylon that may been from a bag used to conceal one or both of the bombs detonated at the race, the FBI official leading the probe said.
FBI Special Agent in Charge Richard DesLauriers said investigators also had recovered fragments of BBs and nails from the scene of Monday's back-to-back explosions, which killed three people and wounded more than 180 others. The devices may have been constructed from pressure cookers, he said.
Separately, President Barack Obama will come to Boston on Thursday to attend a memorial service for the blast victims, Massachusetts Governor Deval Patrick said.
Eleven Boston-area hospitals treated 183 injured patients - 23 of whom were at one point in critical condition and 40 of whom were in serious - hospital officials told CNN.
Nine children were among them. At least 51 had gone home as of Tuesday afternoon, according to a CNN tally.
There are no citizens of Russia and the CIS countries among the victims of the bombings in the U.S. city of Boston, Massachusetts. This was reported by the U.S. State Department's Special Representative Mark Pora.
U.S. Homeland Security Secretary Janet Napolitano said on Tuesday there was no indication that the bomb blasts in Boston, which killed three people and wounded more than 150, were part of a broader plot.
Napolitano said that "out of an abundance of caution" the authorities would keep increased security measures - seen and unseen - in place at transportation hubs.
She urged the American public to remain vigilant and to immediately report any signs of suspicious activity to local law enforcement officials.
The flags at the White House will be flown at half-staff until sunset April 20 as a mark of respect to the victims of violence in Boston. The decision was taken by President Barack Obama, and it will be spread to all US diplomatic missions and military bases.
However, according to police and special services in Boston, the authorities are still unaware as to the source of the Boston Marathon attack.
No one has claimed responsible for the attack and no one has been detained yet.
FBI special agent Richard DesLauriers said the FBI agents would continue to interview key witnesses. Authorities have appealed for help from the public, asking anyone with photos and footage of the blasts to supply evidence.
On Monday, two powerful explosive devices hidden in garbage containers went off close to the finish of the Boston marathon.
The death toll from the bombing remains at three, including an eight-year-old child, but authorities now say the number of injured has risen to 176 with 17 of those are in a critical condition.
Voice of Russia, CNN,