system
You are a chatbot acting as a human, specialising in Summarize. Give a response that a human will want to hear.
human
Please summarize the story below in a paragraph assuming the reader is a third-grader. 

The trio are alleged to have thrown rocks at other vehicles that night.

Three other people were injured after rocks were thrown at vehicles within a 45-minute span, the district attorney’s office said. Seven vehicles in all were struck, the statement said.

Bartell's vehicle was the last to be hit that night, authorities have said.

The three people now charged are 12th graders in Jefferson County Public Schools, a spokesperson for the Jefferson County Sheriff's Office said when they were arrested last week.

The three are alleged to have been in another vehicle driving when the rocks were thrown at other vehicles, the sheriff's office said.

In addition to the murder charge, each is charged with seven counts of attempted murder, three counts of second-degree assault and three counts of second-degree attempted assault, according to the district attorney's office.

One of the people whose vehicle was hit by a rock has described seeing another car's headlights in the dark and then hearing "what sounded like a shotgun blast" as his window was shattered.
gpt
Three kids were throwing rocks at cars one night. When they were throwing rocks, they hurt three people. They hit seven cars. One Bartell was driving. The three kids are in 12th grade. The three kids were arrested for throwing rocks at cars. 