Four foreign aid workers kidnapped in Pakistan in last month "The PHF extends its sympathy to all those directly involved in these incidents and regrets the inevitable delay in getting vital assistance to communities resulting from this insecurity," said Aine Fay, who chairs the group. Pakistan holds exceptional challenges for international aid agencies, which face the threat of rebel groups, Islamist militants and bandits in different parts of the country. Earlier this month, gunmen kidnapped Khalil Dale, a British nurse working for the International Committee of the Red Cross, in Quetta, capital of Baluchistan, where separatist rebels are engaged in a long-running insurgency. Police say they have no leads and have yet to receive a demand from the kidnappers. They have not ruled out either a political or a financial motive. Last year an American development worker was kidnapped from him home in Lahore. In December, al-Qaeda claimed to be holding Warren Weinstein and demanded that the US ended its drones programme and set terror suspects free in return for his release. Intelligence officials have told The Daily Telegraph they believe he was abducted by a criminal gang but has since been sold on to extremists.