A North Carolina man called emergency services to report that he thinks he may have killed his wife in his sleep.

Matthew Phelps of Raleigh told a 911 dispatcher that he "had a dream and then I turned on the lights and she's dead on the floor … I have blood all over me and there's a bloody knife on the bed."

"I think I did it," said Mr Phelps during the seven-minute phone call in which he explained he had taken the cold medicine Coricidin for his trouble sleeping. 

He believed he had accidentally killed his wife Lauren Ashley-Nicole Phelps in his sleep. 

The dispatcher repeatedly asked Mr Phelps, "How?" 

"She's not moving at all. Oh my God. She didn't deserve this," Mr Phelps cried.

A full police investigation is underway.

Mr Phelps is currently being held in jail without bond and due to appear in a Raleigh court on 5 September.