Hit-and-run suspect Jesus Chavarria-Vasquez, 32, allegedly fled on foot early Sunday and Texas cops are hunting for him

Texas authorities are on the hunt for a man accused of killing three men who were changing a tire along a Dallas freeway then leaving his son at the scene of the hit-and-run.

Law enforcement says Jesus Chavarria-Vasquez, 32, fled on foot early Sunday after hitting Hieu Minh Doan, 22, and 23-year-olds David Nguyen and Christopher Pham with his pickup truck.

The trio was standing outside of a gray 2005 Toyota Rav 4 trying to fix a flat tire on the eastbound side of the Interstate 635.

Doan had been driving home from a concert with his friends when the vehicle became disabled west of the Dallas North Tollway.

Police said it appeared the victims had done everything they should do in the situation, including keeping their emergency lights on and not being in the middle of the roadway.

Two more people who stayed inside the Rav 4 were injured and taken to hospital.

One passenger had severe injuries and law enforcement interviewed the other whose injuries were not life-threatening.

A Facebook fundraising page identified one as Tiffany Oung.

Christopher Pham, 23, (left) and David Nguyen, 23, (right) were killed standing outside a car trying to fix a flat tire on the eastbound side of the Interstate 635 Sunday morning

Hieu Minh Doan, 22, was driving his friends home from a concert when the incident occurred. He was described as a 'kind, gentle, caring, and charismatic human being'

Chevy Silverado driver Chavarria-Vasquez allegedly left his injured 12-year-old son at the scene on the 3200 block of the highway where his pickup truck rolled over after colliding with the SUV.

The boy was taken to a hospital, where his mother met him.

The mother – who is the suspect's ex-wife - and child helped police identify Chavarria-Vasquez as a suspect. Chavarria-Vasquez's driver's licence was also left at the scene.

It's not known whether the suspect was under the influence at the time of the crash.

A friend who started a Facebook fundraiser in memory of Doan wrote: 'The news of this struck his friends and family this morning and we are all still in shock, trying to process this. As you may know, me and Hieu have been friends since we were kids. He was pretty much part of my family.

'Hieu was a son, a brother, and a friend. He was kind, gentle, caring, and charismatic human being. He always cared for his friends and never ever ask for anything back. He was dependable, if you ever needed him he would be there. He was a fun person to be around, he was quirky and weird but in a good way where you could crack jokes around him and he would crack jokes back.'

Chevy Silverado driver Chavarria-Vasquez allegedly left his injured 12-year-old son at the scene on the highway where his pickup truck rolled over after colliding with the Rav 4 SUV

The suspect left his licence at the scene and cops interviewed his son and the child's mother, Chavarria-Vasquez's ex-wife, who helped identify the alleged driver

His funeral will be held March 19.

Doan's mother Minh Dang told KTVT-TV he graduated from the University of Texas with a degree in biomedical engineering in 2018.

Doan's sister Tammy begged for the suspect to turn himself in. 'We're pretty forgiving. We're not going to get mad at you for that,' she said about their Hindu faith via NBC 5. 'Please turn yourself in. We're not mad.'

Fundraisers were also started for the families of Nguyen, described as always having a 'smile on his face', and Pham, who 'had one of the biggest hearts'.

Cops said they'll 'leave no stone unturned'.

'We do have investigators out pounding the beat trying to look for him,' Sergeant Warren Mitchell said at a Monday news conference.

'Dealing with one [victim] is horrific and to compound it three times is unimaginable. It appears that all three were friends, so this just had to be a horrific scene.'

Chavarria-Vasquez faces charges of manslaughter and failure to stop and render aid. Police believe he may be driving a black 2008 Cadillac CTS sedan, with Texas plates.

The suspect is believed to have co-founded a flooring business last year and could be driving a white work van.

Contact Vehicle Crimes Detective Jackson at 214- 671-0009 with any information.