PITTSBURG -- One of the region's best-known football teams is not being allowed to do weight-training and other conditioning exercises at Pittsburg High School as a result of a fight that occurred just before the school year ended.

The temporary restriction of access to school grounds since school let out last week is in effect because of an ongoing investigation into the June 3 incident. The fight occurred during school hours at Pittsburg High School and involved a 17-year-old junior who allegedly brandished a gun during a fight in the parking lot that drew more than 20 members of the football team. The student, a member of the football team who was arrested later that day at his home, is facing expulsion proceedings, Principal Todd Whitmire said.

Most of the other students involved in the incident were suspended but allowed to take finals after school hours while others are facing a range of disciplinary actions. In addition, about a half-dozen or so who were seniors were not allowed to participate in graduation ceremonies, he said.

"We are doing an investigation (of) what would result in a student bringing a gun to school. ... Right now, all summer access is on hold, until we get this resolved, until we complete the investigation. It's a matter of the superintendent wrapping up a report to the board and the board making some recommendations," Whitmire said Thursday.

"We want to have this resolved as quickly as possible and not have the students hanging in limbo. ... We don't want to take any organized action pending the resolution of this," said Whitmire, who estimates there are more than 150 students on the football team.

"The cooperation and patience of everyone is greatly appreciated as we conclude the investigation of the June 3 incident, which involved football players. Student safety and quality extra-curriculum activities continue to be of high priority. The intent is to reach resolution within the next week," Superintendent Linda Rondeau said in a text message.

School board trustee Laura Canciamilla said it's possible the matter could be taken up at Wednesday's meeting board meeting.

"We just don't want to (treat) the symptoms, we want to get down to what the root cause of it is," she said.

Contact Eve Mitchell at 925-779-7189. Follow her on Twitter.com/EastCounty_Girl.