The victim police officer was being treated in hospital for his injuries and has been pronounced dead.
It has been reported that the suspect has been shot.
The suspect opened fire at a nursing and rehabilitation centre in Kirkersville.
The shooting happened at Pine Kirk Care Centre and it was reported at 7:50am local time.
The local primary schools have been on lockdown while police investigate.
The Ohio Governor, John Kaisch, tweeted: “Shocked and pained by horrific shooting in Kirkersville.”
The officer’s condition is not known.
There is a heavy police presence in the area.
More to follow…