KABUL, Afghanistan (CNN) -- Motorbike gunmen killed a foreign aid worker in Kabul Monday, the Afghan Interior Ministry has said
In a separate incident, two German soldiers and five Afghan children were killed when a suicide bomber struck an Afghan-German military convoy in northern Afghanistan, said the Kunduz provincial governor.
Gayle Williams, 34, had dual British and South African nationality and worked for SERVE (Serving Emergency Relief and Vocational Enterprise), an inter-denominational Christian charity that helps the disabled, the organization's chairman said in a statement.
Williams was shot in the western part of the city, Interior Ministry spokesman Zemarai Bashary said, while walking to work. She died shortly after the attack, SERVE chairman Mike Lyth said.
"She was a person who always loved the Afghans and was dedicated to serving those who are disabled," Lyth said. "Needless to say, we are all in shock." Williams was one of 23 expatriates who worked for SERVE, which also employs 450 Afghans in the country.
The Taliban claimed responsibility for the death, saying on its Web site that it killed the "foreign woman" for preaching Christianity in the country and adding that it had been following the woman for some time.
In August, aid groups in Afghanistan said in a report that attacks on aid workers have forced them to scale back relief work.