An investigation is underway after Tory Lanez was stabbed in prison, The Post can confirm.

A representative from the California Department of Corrections and Rehabilitation told The Post exclusively that “an investigation has been initiated” by the California Correctional Institution, the state’s prison system where Lanez is behind bars. We’re also told that the state’s prison-oversight agency, the Office of the Inspector General, “has been notified” about the incident.

The Kern County District Attorney’s Office will be ready to step in if investigators find a reason to pursue charges against any of the involved parties, with a spokesperson telling The Post, “Our office awaits a formal complaint following the investigation.”

The rapper, 32, whose real name is Daystar Peterson, was stabbed on Monday morning by another inmate at the Tehachapi prison where Lanez is serving 10 years after being convicted of shooting Megan Thee Stallion in 2020.

“At approximately 7:20 a.m. today, Daystar Peterson ([inmate number] BW0168) was attacked by another inmate at a housing unit in the California Correctional Institution in Tehachapi. Staff immediately responded, activated 911 and began medical aid. Peterson was subsequently transported to an outside medical facility for further treatment,” the CDCR spokesperson confirmed to The Post.

The representative also handed out Lanez’s mug shot, taken in October 2023, which he said is the “latest photograph” of the rapper. It was likely taken when he entered the Tehachapi facility.

After the stabbing, Lanez was taken to a nearby hospital in Bakersfield, California, via an ambulance and treated for non-life-threatening injuries, according to TMZ, which first broke the story.

At this time, the motivation behind the attack remains unclear.

The Post reached out to Lanez’s rep for comment but did not immediately hear back.

On Thursday, the “Alone at Prom” rapper shared a photo on Instagram of him with fellow inmates in jail, and teased that he’s dropping an album soon.

“UPDATE : 2025 …. IYKYK 🤫. LESS IMPORTANT UPDATE : 2ND ALBUM 100 % RECORDED, MIXED & MASTERED 💿 NEW ALBUM. NEW GENRE : S—-Y BASS 🪘SUMMER 2025,” he wrote.

Lanez was taken into custody immediately following his conviction in December 2022.

He was found guilty of three felonies: assault with a semiautomatic firearm, having a loaded and unregistered firearm in a vehicle and discharging a firearm with gross negligence.

Megan, 30, took the stand during his trial and emotionally detailed her lasting scars from being shot by Lanez after leaving a party at Kylie Jenner’s home on July 12, 2020.

The “WAP” rapper testified that Lanez fired the gun at her feet and shouted for her to “dance b—-” as she exited and began walking away from the vehicle they were both riding in. She also claimed that Lanez offered her a whopping $1 million to keep quiet.

Megan was forced to undergo surgery to remove the bullet fragments that were lodged in her feet.

The Grammy winner took a beating from the hip-hop community after coming clean about the shooting, with several in the music industry showing their public support for Lanez.

Megan was granted a five-year restraining order against Lanez in January after claiming he was still harassing her during his incarceration.

“I feel like maybe he’ll shoot me again, and maybe this time I won’t make it,” she reportedly stated in her request.

The restraining order is effective until 2030.

Lanez will be eligible for parole in 2029.