MMA fighter Isaac Johnson dies hours after collapsing during fight

Police are investigating the death

The 31-year-old fighter had been taking part in the Matador Fighter Challenge at Cicero Stadium, but was hospitalised at around 8:38pm, as per NBC Chicago.

Johnson was pronounced dead just hours later at 12:01am.

Police are investigating the death and an autopsy is scheduled.

Joe Goyita, promoter of the event, released a statement to Facebook which read : "This is a post I hoped to never make. Last night one of the fighters in our event, Isaac Johnson, collapsed towards the end of his fight.

"Medical attention was given by medical staff on hand and he was transported to hospital. I was then informed at around 130 am this morning that he didn't make it.

"I don't have the words to express how I feel right now, all I can say is my deepest condolences to his family, friends, and teammates. We will know more as the medical report is released."

A promotional poster shows Johnson's was slated to fight Corey Newell in a Heavyweight Thai fight as per the Matador Fighter Challenge website.

Johnson was pursuing music outside of his fighting career.

Social image: Facebook