CNN: 'At least 19 killed by gov't forces in Iran clashes Saturday'

       At least 19 people were killed by gunfire from government forces during the demonstrations in Teheran, Shiraz and Isfehan on Saturday, CNN reported based on eyewitness accounts of medical officials in Teheran's hospitals. CNN also quoted unconfirmed reports that put the actual death toll at 150. A week of massive street protests over the results of Iran's presidential elections escalated into open defiance of the entire regime on Saturday, when thousands took to the streets of Teheran chanting "Death to the Dictatorship." Ignoring the Friday warning by Iran's Supreme Leader Ali Khamenei to call off the protests and accept the official contention that incumbent Mahmoud Ahmadinejad won the June 12 elections, Reformist opposition leader Mir Hossein Mousavi insistently renewed his demand that the vote be annulled, and indicated that he was prepared for "martyrdom" should he lose his life as a consequence of his and his supporters' defiance. (05,54)