Police vans and cars were seen racing through Greenock and nearby Port Glasgow in response to the incident.
police officer has been stabbed in the neckand a second cop injured after a major incident in Greenock, according to reports.
Police Scotland said they were called to Gateside Gardens in the town at around 8.45am on Friday.
One of the officers, believed to be male, is reported to be in a serious condition after being stabbed in the neck.
The other, thought to be female, is also believed to have been stabbed in the arm.
A man is in police custody and has also been taken to Inverclyde Royal Hospital.