Surveillance cameras inside a jail in San Bernardino County captured an inmate attacking a deputy with a makeshift knife.

The attack happened on Tuesday afternoon at the West Valley Detention Center in Rancho Cucamonga.

The San Bernardino County Sheriff's Office says Christopher Lommie Jackson has been in custody since 2019 for murder.

They say he was armed with a jail-made metal knife and tried to stab another inmate.

When deputies arrived, Jackson tried to stab a deputy and knocked him to the ground.

Other deputies arrived and stopped the assault.

The deputy sustained moderate injuries to his face and was treated and released from a local hospital.

The sheriff's office says there have been 51 attacks on jail deputies by inmates in San Bernardino County this year. From 2022 through 2023, there were 236 assaults on deputies.

Sheriff Shannon Dicus stated, "Such violent behavior poses a serious threat to the safety and security of our staff and inmate populations. Our deputies work tirelessly to maintain order and provide a secure environment within our correctional facilities."