The explosions in front of the Iranian embassy in Beirut that claimed the lives of more than 20 people and at least one Iranian diplomat have been condemned by the U.S., the European Union and the United Nations.

U.S. Secretary of State John Kerry denounced the attacks as “senseless, despicable terrorist bombings” and added: "The United States knows too well the cost of terrorism directed at our own diplomats around the world, and our hearts go out to the Iranian people after this violent and unjustifiable attack."

The British Prime Minister also offered condolences to the Iranian president during a telephone call, in which he talked about “all of us taking a firm stand against terrorism,” a spokesperson for David Cameron announced.

UN Secretary General Ban Ki-moon also spoke out against the attacks, which his spokesman Farhan Haq described as “appalling and indiscriminate acts of violence.”

Similar condemnations of the attacks in Beirut were announced by Catherine Ashton, the EU foreign policy chief, as well as Russia, China, Egypt and Kuwait.