(Reuters) - World number one Jason Day was relieved to hear that his wife Ellie and two children were "resting comfortably" after being involved in a traffic accident on Friday while he was competing at the Deutsche Bank Championship.

Australian Day was informed about the incident after he had carded a one-under-par 70 in the opening round at the TPC Boston in Norton, Massachusetts.

According to a statement issued by Day's management firm, his wife was taken to hospital after the accident as a precautionary measure before being treated and then released.

"Thankfully everyone is now resting comfortably," Day said in a statement. "They will all be monitored in the coming days.

"We want to thank the emergency services and hospital personnel for their assistance."

Day said the incident occurred near his RV motor home that he stays in while competing on tour.

(Reporting by Mark Lamport-Stokes in Los Angeles; Editing by Andrew Both)