File image - Pakistani relatives of Lubna Mahmoud, 26, an aid worker who was killed on Tuesday, by gunmen, prepare to burry her body, during her funeral procession in Swabi.

Seven aid workers, mostly women, were shot to death in northern Pakistan, authorities say. CNN's Jim Clancy reports.

Seven aid workers, mostly women, were shot to death in northern Pakistan, authorities say. CNN's Jim Clancy reports