An intelligence source reported that Ugandan police discovered an unexploded suicide vest and apprehended six individuals suspected of planning the bombings that killed 76 soccer fans. The attacks were carried out by Somali al Shabaab Islamists affiliated with al Qaeda at a restaurant and rugby club in Uganda's capital during the World Cup final. A senior U.S. official indicated that there were signs confirming al Shabaab's claim of responsibility, marking the first time the group had launched an attack outside of Somalia. President Barack Obama described the explosions as "tragic and ironic" due to their occurrence during the World Cup in South Africa. "In one scenario, there is a positive image of Africa progressing, unifying, modernizing, and creating opportunities," Obama stated in an interview with the South African Broadcasting Corp. "On the other hand, there is the disturbing vision of groups like al Qaeda and Al Shabaab focused on causing destruction and death." The U.S. government has been working closely with Uganda and other regional governments to assess whether Al Shabaab is planning further attacks, share intelligence, and determine appropriate actions, according to a senior official. Despite claims by an Al Shabaab official that there were no suicide bombers involved in the recent attack in Uganda, a Ugandan military intelligence source revealed that a warning had been received about a possible attack. However, the U.S. official stated that Washington had not been informed of any preemptive intelligence. An informant from the Kisenyi suburb of Kampala informed intelligence officials on June 17 that there were plans for an attack during the World Cup involving Somalis. The source mentioned that over 20 individuals, including Somalis and Ugandans, were involved in planning the attacks. The official stated that six people from the group have already been arrested. Al Shabaab has threatened further attacks unless Uganda and Burundi remove their peacekeepers from the African Union peacekeeping force in Somalia, where the militants are in conflict with the government and have control over significant portions of the country. Police reported that the suicide vest discovered at a third location on Monday was designed to be planted rather than worn. A man named Yonis, who is an assistant to al Shabaab spokesman Sheikh Ali Mohamud Rage, told Reuters that those who carried out the attack were blessed with rage and were expected to have a long life, indicating that it was not a suicide bombing. He also mentioned that al Shabaab has banned alcohol and watching soccer matches in areas under its control. Coordinated attacks are a common tactic used by al Qaeda and groups associated with Osama bin Laden's militant network. However, if Al Shabaab were to take their pursuit of power to an international level, it would be a first for the militants. U.S. Homeland Security Secretary Janet Napolitano stated that there is a growing concern about Al Shabaab expanding their influence across borders. The U.S. is focused on enhancing preparedness, prevention, and interception measures to thwart any potential terrorist attacks. Al Shabaab has been closely monitored by U.S. officials due to their connections with Al Qaeda in East Africa and the Arabian Peninsula. The official stated that the Kampala attack was consistent with threats to expand its targets, but did not directly address whether the group posed a specific threat to the United States. In an interview with the South African Broadcasting Corp, Obama mentioned that terrorist organizations do not value African life and use the continent as a battleground for their ideological conflicts, disregarding the consequences. The African Union confirmed that Uganda will still host a summit of African leaders despite the attack, and IGAD stated that they will continue to support the government in Somalia and increase peacekeepers in the country. Executive secretary Mahboud Maalim announced plans to bring additional troops to Somalia by the second week of August. Last week, members of IGAD including Kenya, Uganda, Sudan, Ethiopia, Somalia, and Djibouti expressed their desire for 20,000 troops from the AU and United Nations to be deployed in Somalia. Uganda's opposition Forum for Democratic Change party called on President Yoweri Museveni to withdraw his peacekeepers and stated that they would do the same if they won the 2011 elections. The party's spokesman, Wafula Oguttu, told Reuters that there is no peace to maintain in Somalia and that Uganda does not have any strategic interest in the country. Despite concerns that a sustained bombing campaign could harm Uganda's investment climate, analysts believe that a one-time attack would not dissuade major companies like Tullow Oil from investing in the region. Foreign investment in the third largest economy in East Africa has significantly increased due to oil exploration along the western border with the Democratic Republic of Congo. One American citizen was killed in the incident, while five others who were injured were evacuated to Johannesburg and Nairobi by the U.S. embassy in South Africa. The U.S. State Department has confirmed that an FBI team is currently in Kampala.