UN Security Council condemns attack on UN office in Somalia UNITED NATIONS, June 19 (Xinhua) -- The UN Security Council on Wednesday voiced its outrage by the attack on a UN compound in Mogadishu, Somalia, which killed at least 15 people. Mark Lyall Grant, the permanent representative of the United Kingdom to the UN who holds the rotating council presidency for June, said in a statement that the members of the Security Council reiterate their determination to combat all forms of terrorism.. "Terrorism in all its forms and manifestations constitutes one of the most serious threats to international peace and security, and that any acts of terrorism are criminal and unjustifiable regardless of their motivation, wherever and whenever and by whomsoever committed," Grant said. Suicide bombers attacked the UN's office in Mogadishu on Wednesday, leaving at least 15 people dead, including eight working for the UN. The al-Qaida linked militant Al-Shabaab group said it was behind the assault. In the statement, the Council members extended their condolences to the victims and their families, as well as to the people and the government of Somalia, and underlined the support for all UN personnel working to bring peace, stability and prosperity to the Somali people. Meanwhile, the Council reminded states that they must ensure that measures taken to combat terrorism comply with all their obligations under international law, in particular international human rights, refugee and humanitarian law, Grant said. "The Security Council underlines that terrorist acts in Somalia will not lessen the Council's resolve to support Somalia's transition to peace and stability," said Grant. Furthermore, the members of the Security Council reiterate their willingness to take action against those whose behavior threatens peace, stability or security of Somalia. In pictures: Somali Mogadishu beachfront hit by twin bomb attacks Video: UN set to discuss Somalia arms embargo Video: Deadly car bomb rocks Somali capital U.S. condemns "despicable" attack on UN office in Somalia WASHINGTON, June 19 (Xinhua) -- White House on Wednesday strongly condemned the "despicable" attack on the United Nations office in Somalia. "Today's attack highlights the repugnant terrorist tactics al- Shabaab continues to use to stand in the way of efforts to ease the suffering of the Somali people," White House National Security Council Spokesperson Caitlin Hayden said in a statement. UN chief "outraged" by attack on UN office in Somalia UNITED NATIONS, June 19 (Xinhua) -- UN Secretary-General Ban Ki- moon on Wednesday told the Somali president that he was "concerned and outraged" by news of an attack on a UN compound in the capital of the country. "The secretary-general spoke by telephone today with the President of Somalia, H.E. Mr. Hassan Sheikh Mohamud ... thanked the President for expressing his concern and condolences for the attack on the UN compound in Mogadishu," said Eduardo del Buey, Ban's deputy spokesperson, at the daily briefing. 15 killed in UN Mogadishu office attack MOGADISHU, June 19 (Xinhua) -- Suicide bombers attack the UN's office in Mogadishu on Wednesday, leaving at least 15 people dead, including eight working for the UN, an official said. Somali Interior Minister Abdikarim Hussein Guled told reporters that eight people including four foreigners working for the United Nations Development Programe (UNDP) office in Mogadishu were killed in the attack.