22-year-old man delivering DoorDash orders with his teenage brother ambushed and killed, the child shot in the head: Police

Background: The scene of the shooting and crash at the Birchstone Village Apartments in Madison, Tennessee (WTVF). Inset: John Diaz Santos (GoFundMe).

A family in Tennessee is reeling after authorities say two brothers were gunned down while delivering food for DoorDash, leaving one of them dead and the other critically injured.

John Diaz Santos, 22, was identified by the Metropolitan Nashville Police Department as the dead victim. His 14-year-old brother was hospitalized with injuries.

On Thursday, Santos and his younger brother were in a black Infiniti sedan in the parking lot of Birchstone Village Apartments on North Dupont Avenue in Madison, Tennessee, a neighborhood just north of downtown Nashville.

They were delivering food for DoorDash, their father told regional NBC affiliate WSMV. Santos had been working the job for more than a year, and his father said that while they were having dinner that night, Santos said he was going to bring his teen brother with him on the deliveries.

At about 7:45 p.m., a man approached the brothers' car and started shooting, police said, citing the preliminary investigation. "Moments later, two more men approached and one of them also started shooting at the victims' Infiniti," police said.

Santos tried to get away and crashed into a nearby fence. The three suspects ran away.

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Santos was brought to a hospital, where he died, police said. His younger brother was brought to a children's hospital, where police said he remained in critical condition on Monday.

A GoFundMe posted for the brothers and their family says Santos "was a loving, caring, hardworking young man with so many dreams and his whole life ahead of him."

"As if losing John wasn't heartbreaking enough, his brother Alan was also shot in the head," the fundraiser added. "We are grieving one son while praying for a miracle for the other."

Santos' father added that it "shattered [his] soul" to learn that his son died.

"We don't believe what is happening to us," he told the TV station. "One is not prepared for such a loss or news of this size."

Police are asking anyone with information about the shooting to contact authorities at 615-742-7463, saying callers can remain anonymous and receive a cash reward.