Aziza Othman was murdered in Taiz during an attack at a peaceful and unarmed protest by women.

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An American teacher was fatally shot in the province of Taiz earlier this month, Yemeni Defense Ministry officials said.

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Similar incidents elsewhere have intensified outrage, most recently in Taiz, Yemen's second city, where suspected police gunfire killed at least 17 protesters on April 4th.

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"We are investigating the killing as this is the first of its kind against a western national in Taiz, " one of the defense officials said.

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The tens of thousands of demonstrators who have braved gunfire, tear gas and pro-government gangs in Sanaa, Taiz and elsewhere are unlikely to be satisfied by Saleh's departure.

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This free-for-all is almost as alien to the better educated, more law-abiding, Sunni citizens of Taiz, the most urbanised region in the north, or Hodeida, its main port, as it is to the southerners.

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