Three students were injured Wednesday morning after the "accidental discharge" of a police weapon during a safety presentation at a Chino elementary school, police said.

The students -- whose ages were not immediately known -- suffered what were believed to be minor injuries and were taken to an area hospital as a precaution, said Tamrin Olden, crime prevention supervisor for the Chino Police Department. Additional information about their injuries were not immediately known.

"We're still sorting out the extent of the injuries and how it happened," Olden said.

Olden said the incident occurred about 11:15 a.m. during a "Red Ribbon Week" safety presentation at Newman Elementary School.

Calls to a district spokeswoman were not immediately returned. The school referred questions to Chino police.

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