In a separate incident , militants attacked a nonprofit organization in Kabul . Security firm G4S says the victim in the blast was one of its employees . Another victim was an Afghan national working at the British Embassy , UK says . The Taliban claim responsibility for the suicide bombing .
In a separate incident , insurgents attacked a nonprofit organization in Kabul . Security firm G4S says Briton killed in the blast was one of its staff . Another victim was an Afghan national working at the British Embassy , UK says . The Taliban claim responsibility for the suicide attack .