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Mohammed Hamoud, Associated Press
Yemen's President Ali Abdullah Saleh speaks to reporters during a press conference at the Presidential Palace in Sanaa, Yemen, Saturday, Dec. 24, 2011. Yemen's outgoing president said Saturday he would leave the country for the United States to help calm tensions in his country as forces commanded by his son and nephew opened fire on more than 100,000 protesters marching into the capital, killing several.

SANAA, Yemen — Yemenis are rallying to express their anger over the latest deaths of protesters and to demand the resignation of the country's vice president for failing to bring the killers to justice.

Tens of thousands marched Sunday in the capital Sanaa past the office of Vice President Abed Rabbo Mansour Hadi, denouncing him as a "tool in the hands" of outgoing President Ali Abdullah Saleh.

The march took place as Hadi was meeting with U.S. Ambassador Gerald Feierstein.

A statement from Hadi's office said they discussed Yemen's crisis and that Hadi appealed for calm.

Troops commanded by Saleh's relatives attacked peaceful protesters in Sanaa on Saturday, killing at least nine. Yielding to pressure to defuse the country's turmoil, Saleh said Saturday he would leave for the United States.