United Airlines flight from Chicago to Minneapolis diverts to Wisconsin due to "unruly passenger"

A United Airlines flight bound for Minneapolis-St. Paul International Airport from Chicago diverted to Madison, Wisconsin, on Friday night to address a "security concern with an unruly passenger," the company said.

The Boeing 737 departed from Chicago O'Hare International Airport at 8:02 p.m. CDT and landed at Dane County Regional Airport at 9:29 p.m. CDT, according to the flight tracking website FlightAware.

The Dane County Sheriff's Office said that a 75-year-old man's behavior caused the flight to divert. The sheriff's office also said that the man appeared confused and in a "Mental Health crisis." 

According to air traffic control audio obtained from LiveATC.net, one of the pilots told air traffic controllers that it was their "understanding" that "law enforcement officers on board" had "subdued" a suspect on board.

According to the sheriff's office, the man was detained and his family in Minnesota was contacted. The sheriff's office said no criminal charges were being pursued at this time, adding that the man's family was traveling to Wisconsin to reunite with him. 

 In a separate statement to CBS News Saturday, the FBI said it was investigating the incident.    

The carrier said in a written statement that the flight landed safely in Wisconsin and there were no reported injuries among the 147 passengers and six crew members as a result of the incident. The sheriff's office said the remaining passengers were able to resume their flight.

According to FlightAware, the plane departed Madison at 1:25 a.m. CDT and landed at the Twin Cities-based airport at 2:19 a.m. Saturday.