• The shooter first killed his mother and grandmother, who lived in neighboring houses
  • All three women were reportedly shot multiple times
  • A motive behind the shooting remains under investigation

A man allegedly murdered two of his family members and a McDonald's worker before fatally shooting himself Thursday in rural south Georgia.

The shooter, identified as 26-year-old Kentavious White, initially killed his mother and grandmother at their neighboring homes at 6th Street Southwest Thursday. While the mother, 50, died at the scene, the grandmother, 74, who lived next door, succumbed to injuries at the hospital.

Their identities are yet to be released by the authorities.

White then went to a McDonald's restaurant, where he worked, and asked his assistant manager, Amia Smith, 41, to come to the door. He then fatally shot her, CBS News reported. After this, he went inside the restaurant and shot himself dead.

Moultrie police and officials from the Georgia Bureau of Investigation (GBI) responded to the scene and checked the security footage from the fast food chain.

"After reviewing the surveillance footage, agents saw that White arrived at the restaurant, got his manager, Amia Smith, to come to the door. White shot Smith, killing her. White is then seen entering the restaurant where he takes his own life with a self-inflicted gunshot," the GBI said in a statement Thursday.

All three women appeared to have been shot multiple times, according to Colquitt County Coroner C. Verlyn Brock.

A motive behind the shooting remains under investigation.

"I can't for the life of me figure out what provoked him in that way," the coroner told The Associated Press (AP).

GBI agents are investigating the four deaths that took place at the three separate scenes.

"We are working to learn more information and track down some additional witnesses," GBI Special Agent in Charge Jamy Steinberg wrote in an email to AP. "The GBI Crime Lab will perform the autopsies in this investigation."

An unidentified resident of the area where the mother and grandmother lived said she heard about six to seven shots being fired around 12 a.m., but couldn't see anything when she looked outside.

"It's heartbreaking. Let the family be in your thoughts and prayers and the community of Moultrie," another Moultrie resident, Tanner Strickland, told WALB-TV.

Strickland further said he knew both women.

"Both of them were two of the most amazing people I've had the pleasure of being around," Strickland added. "They both light up any room that they walk into. Both of them really have hearts of gold."

Sabrina Holweger, who works at an optometrist's office adjoining the McDonald's, said she and a coworker arrived at their workplace at around 8 a.m. to find the police swarming the fast food chain. She revealed the woman who was killed at the restaurant was the early morning manager and the shooter had been an employee there.

"It was really just scary not knowing if they had shot themselves," Holweger said, as per NBC.

Meanwhile, George Suarez, owner and operator of Moultrie McDonald's, issued a statement, noting the restaurant will remain closed until further notice.

"We are devastated by the loss of our beloved restaurant manager, and our hearts go out to all the victims of this senseless act of violence," the statement read, according to NBC.

If you have thoughts of suicide, confidential help is available for free at the National Suicide Prevention Lifeline. Call 1-800-273-8255. The line is available 24 hours, every day.

Police found an alleged murderer using DNA inside a McDonald's bag. Pictured above is a McDonald's restaurant in in Japan in 2015. Chris McGrath/Getty Images