An 18-year-old man was flown to a hospital by a medical helicopter late Friday following an incident near Johnsburg High School in which he suffered what police said was a “puncture”-type wound by a knife.

Johnsburg Chief of Police Jason Greenwald said the incident occurred in the neighborhood next to the high school along Heather Lane.

Greenwald said police were called to the area around 9:41 p.m. Friday.

Greenwald said two 18-year-old men were in a dispute and authorities determined one of the 18-year-olds had “sustained an injury with a knife,” Greenwald said.

Greenwald said he didn’t have an exact description, but he said it was a “laceration” and officials believe it was a “puncture” type wound with a knife.

The man was airlifted to Advocate Condell Medical Center in Libertyville for further treatment, but Greenwald said hospital personnel said the man is in stable condition and expected to recover. Greenwald said Johnsburg High School is a designated airlift zone for medical helpicopters.

Greenwald said both parties are cooperating with authorities. He said the incident is still under investigation and no charges have been filed.

A McHenry Township Fire Protection District official confirmed the helicopter transport but did not have further details.