Police said security cameras recorded the woman, believed to be a parent of a student at San Antonio's Metzger Middle School, pulling a gun and threatening members of the Kirby High School seventh-grade volleyball team following their victory over the Metzger team, the San Antonio Express-News reported Monday.
"The Kirby team had just won, and they were in the back parking lot near the gym when the woman approached," Judson Independent School District spokesman James Keith said.
The woman "approached them, pulled a handgun and threatened to shoot them," Keith said.
Keith said police were working to identify the woman.
"We believe she was captured on tape, so we hope to be able to identify and arrest her," he said.