A training exercise conducted by the San Francisco Sheriff's Office took a negative turn after dozens of students and staff at a nearby elementary school were exposed to chemical agents on Tuesday ...

The chemicals drifted to Portola Elementary School in San Bruno during a training exercise the San Francisco Sheriff's Office was doing at the nearby San Bruno Jail, according to ABC 7.

Miyamoto said the chemicals, which included tear gas and pepper spray, were a few decades old, but he could not provide an exact date. He said the ongoing investigation will shed more light on that.

The San Francisco Sheriff's Office says it was conducting an indoor training with the chemical agents at the San Bruno jail. They say somehow, the tear gas from the training wafted outside and all ...

The training involved the testing of chemical agents including CS (2-chlorobenzylidene malonitrile) gas and OC gas, or oleoresin capsicum, commonly known as pepper spray.

The training involves the release of CS, the abbreviation for the compound 2-chlorobenzalmalononitrile, which is a chemical in tear gas, and OC gas, which is pepper spray.

SAN FRANCISCO (KRON) — The San Francisco Sheriff’s Office is defending the use of chemical agents that may possibly have been decades old in a training incident earlier this month that exposed ...

Bay Area law enforcement injure 20 kids with 'chemical agent' during training. ... CS (2-chlorobenzylidene malononitrile) gas and OC (oleoresin capsicum) gas, commonly known as pepper spray. ...

Children and an adult were sickened by tear gas and pepper spray that drifted from a law enforcement training exercise area to a school in San Bruno, Calif.

Pepper spray is a chemical spray that causes pain, inflammation, and temporary blindness. Its use is controversial. Learn more here.

A new report from the Board of Correction finds the use of chemical agent spray on Rikers Island has skyrocketed in recent years. Comptroller is rejecting a contract for the department.