Adel bin Ahmed Al-Jubeir, Saudi Ambassador to US: "What occurred today in Boston is a heinous crime which contradicts the values of humanity."
According to a press release, the Saudi ambassador condemned the bombings strongly and offered condolences to the victims' families. He also said that the culprits would be brought to justice. The only person who was considered a potential suspect is a Saudi national. He was apparently in Boston on a student visa and was being questioned by the FBI in a hospital. He also suffered injuries in the blasts.
Boris Johnson, Mayor of London: "The bombings in Boston are shocking, cowardly and horrific, and the thoughts of all Londoners this morning will be with the victims. Boston is a proud City built on history, tradition and a real sense of community. These attacks were aimed at its core, at innocent men, women and children enjoying a Spring day out at a major sporting event. We do have robust security measures in place for Sunday's London Marathon, but given events in Boston it's only prudent for the police and the organisers of Sunday's race to re-examine those security arrangements."
The mayor's office said he had spoken to the local police authorities to discuss the security arrangements for the London Marathon scheduled on April 21. The security at the funeral of former Prime Minister Margaret Thatcher was also under consideration.
Vladimir Putin, Russian President: Putin offered his country's help in investigating the blasts. In a condolences note published on the Kremlin web site on Tuesday, the Russian President said the international community should join hands to fight terrorism. Meanwhile, Russian sports officials said they would beef up security at the upcoming sporting events and also the Sochi winter games next year.
Hamid Karzai, Afghanistan President: "Having suffered from terrorist attacks and civilian casualties for years, our people feel better the pain and suffering arising from such incidents."
Karzai offered his condolences for the victim's families and the people of the USA.
Julia Gillard, Australian Prime Minister: "Australia unreservedly condemns this brutal and senseless attack on what is a great event known around the world - one people participate in to have fun as their families and friends watch on. The images we've seen have been truly shocking ones and our thoughts today are with those who have lost loved ones and our condolences go to those who have lost family and friends in this tragic event... Our thoughts, our condolences are with those in Boston and we will continue to provide advice as we can about who is responsible for this senseless and very, very, cruel attack."
Organizers, Rio Olympics 2016: The organisers of the next Olympics expressed their condolences for the victims of the Boston blast and said security is a top priority for the city ahead of the mega show three years from now. The Olympic committee said it was working with the local government to guarantee the game's safety.
Ban Ki-moon, UN Secretary General condemned the bombing at the Boston Marathon as "senseless violence" and said the bombing "is all the more appalling for taking place at an event renowned for bringing people together from around the world in a spirit of sportsmanship and harmony." Moon was speaking at a ceremony at the UN headquarters commemorating the 19th anniversary of the Rwanda genocide on Monday.
"For now I just wanted to say that my thoughts are with everyone in Boston," Ban said, expressing his deepest condolences to the families of the victims and wishing those injured a speedy recovery.
(With IANS inputs)