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Jacquelyn Martin, pool, Associated Press
U.S. Secretary of State John Kerry speaks during his press conference after the "Friends of Syria Meeting" at the Foreign Office in London, Thursday, May 15, 2014.

LONDON — Secretary of State John Kerry says the U.S. and other nations supporting the Syrian opposition agree that President Bashar Assad's planned presidential election is a "farce" because tens of thousands of Syrians have been displaced by fighting.

Kerry says he and his counterparts from 10 other nations have agreed at a meeting in London to ramp up every facet of what can be done to assist the Syrian opposition. But he stopped short of promising any U.S. military aid.

Kerry says he's seen raw data suggesting that Assad's forces have launched chlorine attacks, but that has not yet been confirmed.

Kerry also says the U.S. is frustrated that humanitarian aid is not getting to the Syrian people and will work through the United Nations to fix the problem.