Gardai have closed the Lower Main Street in Letterkenny following a serious overnight collision.
It is understood at least one pedestrian has been injured following a collision involving a local taxi.
The vehicle also collided with a local house causing some small damage.
Gardai have sealed off the area as a forensics team are expected to arrive shortly.
Approach roads have been sealed off at County Dry Cleaners and also at the Station House Hotel.
Traffic coming into the town from Conwal is being diverted up Convent Road. Traffic travelling down Main Street is being diverted at Larkins Lane.
Donegal Daily has contacted Gardai for further information.