U.N. Secretary-General Ban Ki-moon said he was "appalled" by the reported killing of a group of foreigners who were on a mountain-climbing expedition in northern Pakistan, and he urged the country to take measures to bring the perpetrators to justice. According to media reports, gunmen disguised as paramilitary police killed 10 people at the foot of Pakistan's second-highest peak, Nanga Parbat. The dead include a number of Ukrainians and Chinese, one U.S. citizen, and their Pakistani guide "The secretary-general is deeply concerned by the mounting terrorist attacks and bombings in Pakistan, which in the past several weeks alone have claimed the lives of dozens of civilians," a Ban spokesperson said in a statement late Sunday. "While reiterating the support of the United Nations to the government of Pakistan in the face of terrorism and extremism, he urges it to take immediate measures to bring the perpetrators to justice and to ensure security," the statement said. A little over a week ago, a series of deadly attacks in Pakistan targeted a bus, a hospital facility, and a historic house, killing at least 20 civilians, many of whom were female students.