Heavy artillery, mortar shelling and gunfire killed at least 20 people in a fourth day of fighting between rival militias in the Somali capital, residents and militia leaders said on Saturday. The battle, which erupted on Wednesday and has killed at least 70 people so far, had eased overnight. But fighting broke out in the Daynile and Keysaney districts on Saturday, sending terrified residents fleeing, witnesses said. Full Story