A man who was assaulted during a Hank Williams, Jr. concert in Michigan has died.

Robert Kobe, 55, was caught up in a fight with an unnamed 15-year-old boy at the DTE Energy Music Theatre just outside Detroit on Sunday (17Aug14).

According to police reports the teen pushed Kobe during the concert, causing him to fall and hit his head on the concrete floor.

The boy was detained for one night at Oakland County's Children's Village juvenile detention facility and released into his parents' custody, while Kobe, who has been in hospital since the incident, was pronounced dead on Tuesday (19Aug14).

An investigation is still pending, but Kobe's son, Cory Kobe, tells the Detroit Free Press that his father and the teen knew each other prior to the incident, and Kobe may have even provoked the young man.

Cory says, "I want to make sure that this young man gets fair treatment. There are a lot of indications that there was no malicious intent."

Williams, Jr. has yet to comment on the incident.