Gunmen killed 13 passengers travelling on a bus in Afghanistan on Tuesday, underlining the country’s fragile security situation as President Ashraf Ghani holds talks with the United States in Washington.

The attack in Wardak province, which lies close to Kabul, is the latest to hit civilians in Afghanistan’s still-bloody conflict (…)

The number of civilians killed and wounded in Afghanistan jumped 22 percent in 2014, the United Nations said last month, as NATO troops withdrew from combat.