A young boy died and his older brother was injured after someone fired a gun at them on a Michigan highway, the latest case in a rash of road shootings that have killed children, the Detroit News reports.

Police have yet to find the shooter.

The incident happened on Interstate 75 in Detroit, when Brian Christian, the boys’ father, was driving the family’s pick-up truck around 9:45 p.m. Thursday. That’s when a light-colored, four-door vehicle pulled up alongside the truck.

Someone then fired shots, which struck 2-year-old Brison Christian and his 9-year-old brother, BJ.

The boys’ father told WDIV-TV that he applied pressure to his sons’ wounds. Emergency crews later rushed the brothers to Children’s Hospital of Michigan, where Brison died. BJ has since been released from the hospital.

“This is certainly the worst day of the family’s life,” Detroit interim police Chief James White told reporters at a press conference, according to the newspaper. “I cannot fathom what they must be going through.”

White said he would do whatever he could to “help get this monster off the street.”

Multiple law enforcement agencies are now searching for whoever fired the gun. Authorities are looking for a late-model silver Chrysler 300 without a license plate, according to the newspaper.

Investigators have not yet determined whether the children were targeted or if the shooting was prompted by road rage, according to the Detroit News.

White has called on community leaders to address growing violence on the roads.

“It’s awful. There’s no words to even provide comfort. All I can do is be there and talk to the family and to reassure them we’re going to do every single thing we possibly can as a law enforcement agency to bring justice to their son,” White told WDIV-TV.

Brian Christian told the television station that he couldn’t understand why this would happen.

“We do all of the stuff the right way. We’re not in the streets . . . We have no enemies. Stuff like this shouldn’t happen,” Brian Christian told WDIV-TV.

He added: “I would’ve bet my last dollar that boy was going to be special. He was going to make something of himself.”

A candlelit vigil is scheduled for Saturday night in honor of the victims.

The shooting comes about a month after a 6-year-old boy was shot and killed in California in an apparent road-rage incident.

To report information about the Michigan shooting, call Michigan State police at 734-287-5000 or 855-MICH-TIP.

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