Cameras capture the moment a bomb explodes as runners crossed the finish line at the Boston marathon on Monday.<br/> <br />The dual blast left three people dead and at least 176 wounded.<br/> <br />Among the victims were two Chinese students, one killed and one left gravely injured.<br/> <br />The Chinese Foreign Ministry in Beijing said the government was "extremely concerned" after the attack.<br/> <br />The ministry's spokeswoman said Chinese authorities will spare no effort to assist in helping the victim's families.<br/> <br />The wounded Chinese student is currently recovering at Boston Medical centre after two operations.<br/> <br />China's deputy consul general told reporters that her life is no longer in danger, and held a note up that she had written which said: "I am fine, don't worry".<br/> <br />Both Chinese students were watching the race when the explosions went off.
