Two inmates were killed in separate prison attacks in the state of California.

Authorities believe that other inmates attacked and killed Sidney Kang, 31, and Edgar Delgado, 39, both of whom were inmates at the same facility, and that their deaths were a result of the attacks.

Officials in California have confirmed that two convicts in separate California prisons were slain this week in attacks by other inmates.

Sidney Kang, 31, died on Thursday after being attacked in a recreation yard at Kern Valley State Prison in Delano at about 10 a.m. Sidney Kang was a prison officer at Kern Valley State Prison in Delano. He was taken to prison and treated for his injuries, but he died a short time later.

It was revealed that Kang had been incarcerated since 2014 and was serving a 14-year sentence in Los Angeles County for assault with force likely to cause serious bodily injury, according to officials. He had already been convicted of a serious felony, and this was his second conviction in as many years.

Anthony Ramirez and Michael Caldera, two convicts at the same facility, were suspected of being the perpetrators. The homicide detectives discovered that the weapons used in the killing appeared to have been made by inmates, which led them to believe that they were.

As a result of his arrest in Los Angeles County, Ramirez, 40, was sentenced to life imprisonment with the potential of early release in 2008. His sentence was increased to another 12 years in prison for attacking a fellow inmate two years ago, and he was sentenced to another two years in prison last year for possessing or manufacturing a deadly weapon, according to authorities.

As reported by the Los Angeles County District Attorney’s Office, Caldera, 35, was sentenced to 71 years and four months in prison in 2010 for a string of second-degree armed robbery offenses committed in San Bernardino County.

According to prison officials, one of the inmates at the Salinas Valley State Prison in Soledad, Calif., attacked Edgar Delgado, 39, on Tuesday evening with a makeshift weapon, according to a statement.

According to officials, chemical agents were deployed by correctional guards to put an end to the assault.

The identity of the other inmate has been withheld pending the outcome of the investigation, which is being conducted as a homicide investigation.

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Delegate Delgado has been serving a life sentence with the possibility of release since 2008. In Los Angeles County, he was accused of attempting to kill an LAPD officer or a fireman with a handgun, discharging a firearm with gross carelessness, and being an ex-felon in possession of a firearm, among other things.