Clashes with assault rifles and rocket-propelled grenades raged Tuesday between rival tribesmen in a suburb of the Yemeni capital Sanaa for the fifth consecutive day, but authorities made no attempt to end the conflict. A row between the Hamadan and Abi Matar tribes erupted last year over the ownership of hills located on the border between the two groups’ lands. Clashes resumed last week with no settlement in sight. Mediation by tribal notables has so far failed, a tribal source told United Press International. Full Story