More than 200 people were slain on March 7 in mostly Christian towns . Of the 163 arrested , 41 will be charged with homicide . Score: 6 Nigeria has a mainly Muslim north and a mainly Christian south .
More than 200 people were slain on March 7 in mostly Christian towns . Of the 163 arrested , 41 will be charged with homicide . Massacre thought to be in retaliation for deaths of about 150 Muslims in January . Nigeria has a mainly Muslim north and a mainly Christian south .