LOS ALTOS (CBS SF) – The substance that sent a Los Altos police officer to the hospital Monday morning has been confirmed to be the powerful synthetic opioid drug fentanyl, police said.

The call came in around 9:25 a.m. at the police station at 1 N. San Antonio Road, Santa Clara County Fire Capt. Bill Murphy said.

READ MORE: Mistrial In Manslaughter Case Against Danville Deputy Andrew Hall Over Laudemer Arboleda Killing; Guilty Verdict For Gun Assault

Chopper 5 over the Los Altos Police Department after a reported fentanyl exposure prompted a response from firefighters, August 12, 2019. (CBS)

Chopper 5 over the Los Altos Police Department after a reported fentanyl exposure prompted a response from firefighters, August 12, 2019. (CBS)

Police said three officers were processing evidence when the exposure occurred. All three were found to by asymptomatic, but one reported feeling ill.

READ MORE: Lake Tahoe Boat Inspectors Find Record Number Of Vessels With Invasive Mussels

That officer was transported to a hospital with symptoms that were not thought to be life-threatening and is currently listed in stable condition.

Emergency crews isolated the substance in question and quarantined the area. They’re currently working with police to make sure the facility is safe to work in again.

MORE NEWS: UPDATE: Pleasant Hill In-N-Out Burger Shut Down for Repeatedly Defying COVID Health Order

© Copyright 2019 CBS Broadcasting Inc. and Bay City News Service. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.