Kenyan prosecutors will charge the sister of opposition leader Raila Odinga and opposition senator Fred Outa with incitement to violence and other crimes after attacks on staff of the election board last week, the chief prosecutor’s office said on Monday.

Raila Odinga speaks out as Kenya court nullifies president’s election win.

Odinga has been due to compete against incumbent President Uhuru Kenyatta in a repeat presidential election on Oct. 26, but pulled out earlier this month, saying the polls would not be free and fair and calling for a boycott of the vote.