According to a report by Geo News, police in Multan filed a case against PPP workers after they broke through security barriers and stormed into Multan's Qila Qasim Bagh on Saturday.
When questioned in the station premises, the suspect opened fire at a Counter Terrorism Department official but the bullets missed the official.
Demonstrators gathered outside Tehkal Police Station and shouted slogans against officials on Friday.
A policeman was injured in the attack, police said, adding that one person has been arrested.
The police have recorded the girl's statement and investigation is underway.
The police also seized huge cache of arms and ammunition from their possession.