A GRANDMOTHER and three other female relatives of two sisters were yesterday charged over the genital mutilation of the girls.
Detectives have been continuing their investigations since charging a Sydney sheik, a retired nurse and the parents of the girls last week.
Strike Force Longfield detectives worked closely with NSW Health and the Department of Family and Community Services.
Yesterday two women were arrested in Sydney and two women in Wollongong.
Police will allege the four women, aged 39, 68, 73 and 77, were each present at one or both of the procedures, also known as female circumcision, performed on the two sisters when they were aged six and seven.
The women have been granted bail to face Parramatta Local Court on November 7.
Sheik Shabbir Moham-medbhai Vaziri, 56, of the Dawoodi Bohra community at Auburn, and Helen Magennis, 68, a retired nurse of Campbelltown, and the children's parents were all previously charged in relation to the alleged acts on the girls.
The girls remain in the care of their parents.