(AP) — An employee for the city of Minden in southern Nebraska has died following exposure to toxic gases from a sewer line.

Authorities say 55-year-old Robert Honomichl died Tuesday morning at Good Samaritan Hospital in Kearney.

Honomichl and another employee, 51-year-old Mike Kleen, were clearing a blockage on Sunday when they were overcome by toxic gases in the manhole. The city is investigating the incident.

Kleen was released from a local hospital and is recovering at home.