SA security guard punched in head

A security guard has been punched in the head by a man outside a hotel on South Australia's Eyre Peninsula.

The 21-year-old allegedly attacked the guard, fracturing his jaw and causing him to collapse and hit his head, after being kicked out of a Port Lincoln hotel just before midnight on Saturday, police say.

The accused fled the scene but was caught by an off-duty police officer. He has been bailed to appear in the Port Lincoln Magistrates Court on February 8, charged with aggravated assault causing harm.

The security guard is in hospital in a stable condition.