A US Air Force F-16 fighter jet has crashed at Nellis Air Base near Las Vegas during a routine training flight.

It is not yet clear how many people were on board or if any were hurt.

The incident occurred at 10.30am local time.

In a statement, the air base said: 'An Air Force F-16 assigned to Nellis Air Force Base, Nevada, crashed at approximately 10:30 am during routine training on the Nevada Test and Training Range.

'The condition of the pilot is unknown at this time.

'Emergency responders are on the scene. As soon as additional details become available, they will be provided. The accident is under investigation.'