Fighting between two Arab tribes has killed 100 people in Sudan\'s Darfur region, where worsening unrest has left hundreds dead this year, one of them said on Sunday. The battle between a group of Rezeigat and the rival Maaliya tribe happened near Adila in East Darfur state on Saturday. \"We clashed with Maaliya... and we destroyed a compound of theirs and killed 70 of them,\" said a Rezeigat source, who declined to be named. \"We lost 30 of our men.\"