He did not provide a total number of militia attacks. But he said 73 percent of the attacks that wounded or killed U.S. troops last month in Baghdad were launched by Shiite militiamen, nearly double the figure six months earlier.
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Odierno said Iran has sharply increased its support for the fighters ahead of a September report to Congress on progress in Iraq, leading to the surge in rogue militia action.
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“We knew this was coming, but there’s been a shift,” Odierno told The Associated Press in an interview after touring a mainly Shiite area of southeastern Baghdad. “Because of the effect we’ve had on al-Qaida in Iraq and the success against them and the Sunni insurgency, it’s now shifted.”
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Despite progress against al-Qaida in Iraq, Odierno reiterated the U.S. concern that insurgents linked to the group would try to stage an attention-grabbing attack ahead of the September report.
“I think they want to try to influence that,” he said. “We have to stop them from trying to conduct some large attack here over the next 30-45 days.”
http://www.washingtonpost.com/wp-dyn/content/article/2007/08/05/AR2007080500936.html
Thanks for the link to the WaPo article. There's far more information in it.