A 25-year-old man has been charged with assault and battery after attacking American Idol host Ryan Seacrest's bodyguard.

Seacrest was visiting the Children's Hospital in Orange County, California at the beginning of the week when Chidi Uzomah approached him and asked for an autograph.

The TV presenter obliged and then walked away. As Uzomah started to follow, Seacrest's security guard stepped between the two, prompting the fan to lash out. Uzomah started choking the guard, according to TMZ.com.

Police were called to the scene and the fan was subdued and arrested. They found a switchblade knife on him.

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(This news article provided by World Entertainment News Network)