Gunmen kidnapped an American U.N. worker and killed his driver in southwestern Pakistan on Monday, Associated Press reported. Pakistan's Foreign Ministry called the abduction a «dastardly terrorist act,» but it was not clear who seized the head of the U.N. refugee office in the city of Quetta as he traveled to work. Police officer Khalid Masood identified the victim as U.S. citizen John Solecki and said he had been working in Quetta for more than two years. Authorities sealed exit routes from the city, said Wazir Khan Nasir, another officer. Police in the border town of Chaman said they were checking vehicles to prevent the kidnappers from whisking the captive to Afghanistan.