NASCAR driver Kurt Busch is being investigated for alleged domestic abuse.

Dover police say they began the investigation on Wednesday but would not say exactly what happened.

NASCAR said in a statement, "NASCAR is aware of the investigation involving driver Kurt Busch. We recognize the seriousness of this matter and are actively gathering information from all parties, including law enforcement authorities and Stewart-Haas Racing. It would be inappropriate for NASCAR to comment further on this matter until we have more information."

Busch was suspended in 2012 for threatening a reporter.