Kabul's police chief resigned Sunday after a Taliban attack killed four foreign workers at their agency's office.

Police Chief Gen. Mohammed Zair told reporters the victims included a South African who was the leader of the foreign group, his son and daughter, as well as an Afghan worker, BBC reported. He did not reveal the identities of the victims, nor the agency they worked for.

However, a Redlands, California-based group called Partnership in Academics and Development posted a notice on its website regarding the deaths of several staffers during a Saturday attack in Kabul, The Associated Press reported.

"We are caring for all staff and their families as they grieve the loss of their friends and co-workers and nurse the wounded," the statement read. "Our thoughts are with the survivors and their families as they grieve the loss of life. Their selfless sacrifice for the people of Afghanistan is an inspiration to all."

A family spokeswoman, quoted by AFP news agency, named the three dead as Werner Groenewald, 46, who ran the charity, his daughter Rode, 15, and son Jean-Pierre, 17, according to BBC. The four deaths were the latest in a series of suicide attacks by the Taliban in Kabul in the past week.

Two American soldiers were killed on Monday, and two British embassy workers were killed on Thursday. In addition, Taliban militants attacked a camp which was vacated by British forces a month ago. The attack started Thursday and carried into Saturday, killing dozens of Afghan soldiers.

The latest attacks are a result of the pulling out of foreign troops, leaving both NATO and U.S. military forces to separately advise Afghan soldiers. By Jan. 1, the two entities will reportedly be the only two in the area, with about 12,000 NATO soldiers to advise Afghan security and the U.S. forces advising on operations against Taliban attacks.

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