Letterkenny University Hospital has moved to Major Emergency Standby as it deals with the incident.
In a statement, the hospital says multiple injured people are requiring immediate attention.
People are being asked to not attend the Emergency Department unless it is an emergency.
Statement in full:
‘Letterkenny University Hospital is dealing with a serious incident, with multiple injured people requiring immediate attention.
The hospital has moved to Major Emergency Standby as it deals with this incident.
We are appealing to the public not to come to the Emergency Department unless it is an emergency. Please contact your GP or NowDoc service in the first instance. NowDoc has increased staffing this evening to help deal with any additional demands.’