Harry Potter star Emma Watson was left "quite shaken" after students from rival Harvard University stalked her during a recent football game.

The actress, who attends Brown University, was at a game between the two schools on Saturday, but security guards had to surround her to protect her from harassment.

Harvard's student magazine The Voice targeted Watson and posted a blog on its website stating supporters would try to draw as much attention to her as possible. The post reads, "We will be Live-Tweetin the game and possibly stalking Emma Watson, so keep your eyes peeled for that, too!"

During the game, students from the Harvard Voice wrote a series of posts on Twitter.com, including: "In enemy territory. Lookin for a certain witch, and, WATSON FOUND. I repeat WATSON FOUND."

The magazine also posted a photo of the star and branded the stalking campaign a "success," according to New York gossip column PageSix.

However, after a series of complaints, the editor of The Voice attached a note to the picture saying, "There seems to be much ado about nothing over this photo and liveblog. Understand that these live tweets were made to be intentionally outrageous and overblown."

There was no comment from Watson's representative as WENN went to press. A spokesperson from Brown said, "This isn't the sort of thing we comment on."

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(This news article provided by World Entertainment News Network)