A man has died after being found unresponsive in a Faribault manhole on Friday.

The Faribault Fire Department and law enforcement responded to a call of a person unresponsive in a manhole on the 1900 block of Second Avenue NW. about 7:30 a.m. Friday, a Fire Department news release said.

Firefighters entered the manhole and gave the man oxygen before removing him and taking him to a waiting ambulance helicopter, the release said. The manhole had high levels of hydrogen sulfide and carbon monoxide, as well as low oxygen levels, tests found.

"This is a tragic event and our hearts go out to the family and friends of the individual," Fire Chief Dustin Dienst said in a statement.

Faribault fire and police crews conducted an investigation and the Occupational Safety and Health Administration was notified.