UPLAND (CBSLA.com) — A woman was shot with a pellet gun by her adult stepdaughter on Friday afternoon at an Upland elementary school, authorities said.

The shooting occurred shortly after 4 p.m. Authorities said the victim, who works in the daycare program, was shot three times and taken to a hospital with minor injuries. The suspect, identified as a 41-year-old Claremont woman, was taken into custody and also hospitalized with what was believed to be a self-inflicted pellet-gun wound.

The school, Pepper Tree Elementary, was put on lockdown and was being evacuated Friday evening as police investigated. The lockdown was lifted later in the evening.

“This was a fluke situation,” said Upland Unified School District Psychologist Christy Boch. “There is safety at the schools. We have lockdown procedures. We definitely have ways to protect kids.”

Police on Friday night were trying to determine how the suspect entered the campus.