CHICAGO (WLS) -- A Chicago police officer shot and killed a fellow officer during a tactical operation Thursday night, police said.

CPD said Friday that the only weapon discharged during a confrontation with an armed suspect in Chatham Thursday was that of an officer, who unintentionally shot Officer Krystal Rivera, 36.

ABC7 Chicago is now streaming 24/7. Click here to watch

The investigation into the alleged aggravated assault of the officers by an armed suspect, who pointed a rifle at police is ongoing, police said.

The suspect remains in custody.

Detectives also continue to investigate the circumstances that led to the investigative stop before the deadly encounter.

"We ask that the city continue to pray for fallen Officer Krystal Rivera's family during this heartbreaking time. W

See Full Page