A remote-controlled roadside bomb tore through a vehicle transporting Afghan aid workers in northern Afghanistan on Tuesday, killing three men, police and the humanitarian group said. The three were travelling to a district near the border with Uzbekistan and Turkmenistan to select families to benefit from a shelter project, said a Development and Humanitarian Services for Afghanistan (DHSA) board member. "Along the way, their vehicle was struck by a remote-controlled bomb and they were all killed," Shafiqullah Wardak told a foreign news agency. "They were torn into pieces by this barbaric act." The dead were a driver and two employees for the programme which provides shelter to families that have returned from exile, Wardak said.