HERAT, Afghanistan -Unidentified gunmen pulled over a car and shot dead a UN driver in western Afghanistan, police and the United Nations said Wednesday. Another UN employee and a government official fled the attack in the Balabuluk district of Farah province late on Tuesday, UN spokesman Aleem Siddique told AFP.The victim was named as Yar Mohammad, a driver for UN-HABITAT, the United Nations Human Settlements Programme. “An unknown number of gunmen in a car stopped a UN-HABITAT vehicle carrying three people. The driver was brutally shot by unknown assailants,” Siddique told AFP. “The two passengers fled as the assailants drove off,” he added.