Gardai and other emergency services are at the scene of a crash on the outskirts of Buncrana.
The crash happened at Cash na Cor.
Donegal County Council have issued a statement saying the road is closed and diversions are in place.
Traffic travelling from Buncrana to Clonmany or Carndonagh is to divert at the Cockhill Bridge and proceed to the Kinnego Cross roads, then the Shandrum Crossroads where they will return onto the R238. This diversion will be sign posted and will operate both ways.