DENVER (AP) -- Denver police say someone has fired a shot through the window of President Barack Obama's Denver campaign office.<br />
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Police spokeswoman Raquel Lopez says people were inside the office when the shooting happened Friday afternoon, but no one was injured. A large panel of glass was left shattered at the office on West Ninth Avenue near Acoma Street.<br />
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Lopez says investigators are looking at surveillance video but have not yet confirmed a description of a vehicle that might be linked to the shooting. Police didn't immediately release other details while detectives pursue leads.<br />
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Lopez says she isn't aware of any previous threats against the campaign office.<br />
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The Secret Service referred questions about the incident to Denver police.<br />
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An Obama campaign spokeswoman declined to comment.
