ROUGH CUT - NO REPORTER NARRATION<br/> Gunmen opened fire on a school bus in the Pakistani city of Peshawar killing at least three children and the driver, a police official said.<br/> Deputy superintendent of police in Peshawar, Sahibzada Sajjad said first a rocket was fired but didn't hit its target, then gunmen opened fire.<br/> At least five children were wounded.<br/> There was no immediate claim of responsibility.<br/> Pakistan's Taliban, also allies of militants in neighbouring Afghanistan, are waging a campaign of mostly suicide bombings in a bid to topple the U.S.-backed government.
