An Oklahoma dad killed his three young children inside their parked SUV before he turned the gun on himself to commit suicide. 

Police said Trinity Littlejohn, 3; Aliyah Littlejohn, 4; and Kyren Littlejohn, 6, were shot to death by their father, Francoise Littlejohn, 30, on Saturday.

According to People, the mother left the kids with their dad days before the killings following a domestic incident between the couple at their home in Oklahoma City.

Domestic Dispute May Have Led to Oklahoma Dad to Kill His Children

Reports said Francoise Littlejohn was very upset because his wife left him. The Oklahoma dad took his three children from their NW 109th Street family home early Saturday morning and loaded them into his white Dodge Charger.

Surveillance video in the neighborhood showed the suspect pulling into an area at the 11300 block of Treemont Lane at around 4 a.m. and parked there.

Littlejohn then livestreamed on social media his threats to harm his children. In the video, police said the Oklahoma dad was seen waving a gun while one of his children was seen in the front passenger seat of the SUV.

Littlejohn also told the kid he was going to kill them. According to local news station KFOR, a relative of the family saw the live video and alerted the police, who tried to find the vehicle.

However, a jogger passing on Treemont Lane at around 7:30 a.m. found the four family members dead inside the SUV from apparent gunshot wounds. The runner then called 911.

The vehicle's engine was reportedly still running when the SUV was found. Police were combing the streets and were about to issue an Amber Alert when the vehicle was reported.

Police said they found a gun and a cell phone in Littlejohn's lap when officers arrived. Authorities believed that the Oklahoma dad fatally shot his three children before using the same gun to kill himself.

Police said the kids had injuries consistent with homicide, while Francoise Littlejohn had an injury consistent with suicide.

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Community Mourns Deaths of Three Little Children in Oklahoma City

Concerned citizens have set up a GoFundMe campaign for the family to help them with funeral costs. Community members constructed a memorial at the scene. They gathered near the memorial on Wednesday night to remember the three children.

One of the community members, Angela Ross, told KFOR that the passing of the three children "because of somebody else's problem" was heartbreaking. She added that their community had not seen anything like this, and they had lived there a "long time."

Adina Evans-Cornish, who lives in an adjacent neighborhood, also told the outlet that the Oklahoma dad must have been hurting so bad for him to do what he did, including doing the video.

She noted that the three children lost their lives because their father was suffering, adding that they were now sitting in God's lap.

According to the outlet, community members placed an iron cross, balloons, flowers, candles, and stuffed animals at the memorial along the neighborhood street, near Hefner and Council, where the children died. 

Three Care Bears were reportedly placed at the memorial, one for each child.

READ MORE: Louisiana Mom Stabs Her 2 Kids, Kills 4-Year-Old Daughter Before She Does Instagram Live Covered in Blood

This article is owned by Latin Post.

Written by: Rick Martin

WATCH: Father Livestreams Murder of His 3 Children Before Committing Suicide - From Fox 28 Houston