PICTURED: Georgia siblings aged 9, 11 and 13 killed in murder-suicide after their mother's ex took them to get food while she was in the hospital with their injured child

Three young siblings from Georgia were killed in a suspected murder-suicide after their mother's ex took them to get food while she was in the hospital with their brother.

Gwinnett County Police identified the deceased as 13-year-old Arianny Rodriguez, 11-year-old Chadal Rodriguez and 9-year-old Carlos Rodriguez. The children were found dead inside a car Wednesday alongside 56-year-old Jose Plasencia.

Plasencia and the children’s mother, Karina Rodriguez, share another child, who had been hospitalized earlier that week.

'The suspect met with the victims’ mother, her three children, and the child they shared together at a local hospital,' police said.

'After some time, the mother agreed to let the three children go with the suspect to grab a bite to eat while she remained at the hospital.'

Police have identified the three children found dead inside a car in Atlanta as 9-year-old Carlos Rodriguez (left), 11-year-old Chadal Rodriguez (center) and 13-year-old Arianny Rodriguez (right)

The children were found alongside Jose Plasencia, 56, who shared another child with the siblings' mother, Karina Rodriguez

The siblings went with Plasencia to get food while their mother was in the hospital with her other child. Their bodies were found Wednesday morning

Investigators believe the deaths are the result of a murder-suicide, but are awaiting confirmation from the medical examiner's office

Plasencia's brother claimed he was suffering from depression that had gotten worse due to 'due to economic and health problems'

It is not clear how long the children were with Plasencia, but around 1 a.m. Wednesday, a patrolling officer encountered a 'suspicious vehicle' that had been parked on the pedestrian walking trail at Lucky Shoals Park in Norcross.

The car, a 2005 Honda Accord, was still running and its rear lights were on, according to a police report.

In the backseat, the officer discovered the bodies of a young boy and girl, face-down and on top of each other. Blood pooled beneath them, and one of the children appeared to have suffered a gunshot to the head.

Another girl was found slumped over in the front passenger seat. Beside her, Plasencia was limp, the window next to him shattered.

The officer determined that all four were 'obviously deceased,' according to the report. Police initially believed Plasencia was the children's father at the time of the grueling discovery.

Their deaths are suspected to be the result of a murder-suicide, but investigators are awaiting confirmation from the medical examiner's office.

On Thursday, families in the DeKalb County School District were informed that two Kingsley Elementary students and one Peachtree Middle student had died.

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Kingsley Elementary, which Carlos and Chadal attended, posted a statement to Facebook.

'One of our Kingsley families suffered a devastating loss this week. Our hearts go out to them, and to all of our students and staff members who held these children close,' the school wrote.

The statement urged community members to consider donating to family's GoFundMe, 'as they navigate their unspeakable loss'.

The fundraising campaign, organized by a friend of Rodriguez, included an appeal from the grieving mother.

'I am a single mother and my heart is broken by the tragic loss of my three little angels,' Rodriguez wrote. She requested help with funeral expenses and funds needed to send the children her native Dominican Republic for a 'Christian burial'.

'I am devastated with my heart in pieces,' Rodriguez said, describing the children as her 'world'.

Speaking to Al Momento, a Dominican news outlet, Plasencia's brother claimed the 56-year-old had been suffering from depression that had worsened 'due to economic and health problems'.

The man's neighbors described him as a family man who, 'despite his financial and health problems,' continued to send money to his 84-year-old mother to afford her medication.

Plasencia was not romantically involved with Rodriguez at the time of the deaths.

Police records show he was previously arrested on an 'expired or no license' charge and a traffic violation, but had no charges or convictions related to violent crime.

The 56-year-old was known to own a gun but told people he recently sold it, according to police.