A critical incident investigation has been launched after two men – including a police officer – suffered serious injuries following a motorcycle crash in the Lake Macquarie region today.

About 4.40pm on Monday 4 October, emergency services were called to Mandalong Road near Deaves Road, Mandalong, after reports of an accident between two bikes.

A 36-year-old on-duty Senior Constable, riding a marked NSW Police Force motorcycle, suffered serious injuries.

He was taken to John Hunter Hospital in a serious but stable condition.

The second rider, a 69-year-old man, also suffered serious injuries.

He was airlifted to Royal North Shore Hospital in a serious but stable condition.

A crime scene was established by officers from Lake Macquarie Police District, which will be examined by specialist police from the Crash Investigation Unit.

A critical incident team from the Tuggerah Lakes Police District will now investigate all circumstances.

That investigation will be subject to independent review.

No further details are available at this time.

Get all the latest Newcastle news, sport, entertainment, lifestyle, competitions and more delivered straight to your inbox with the Newcastle Weekly Daily Newsletter. Sign up here.