U.N. Secretary-General Ban Ki-moon is outraged over the attack on the U.N. compound in Somalia that has reportedly killed at least 14 people, his spokesman said Wednesday. Seven militants, four U.N. employees, and three female civilians were killed, said Abdikarim Hussein Guled, the country's interior and national security minister. The other victims were rushed to a hospital. Al-Shabaab, the militant group linked to Al Qaeda, claimed responsibility on Twitter. "The secretary-general said he was deeply concerned and outraged by the despicable attack against the United Nations," Ban's spokesman, Eduardo del Buey, told reporters. Del Buey said that the U.N. chief made the comments during the course of a conversation with Somali President Hassan Sheikh Mohamud, who telephoned Ban to express his condolences for the attack. Ban told Mohamud that the United Nations would not be deterred from delivering its mandate in Somalia, del Buey said.