Two Australian Special Forces soldiers have been wounded by a blast from an improvised explosive device (IED) in Afghanistan's Helmand province.

A statement from the Defence Force says the IED detonated during a patrol on Sunday, also wounding a coalition soldier and two Afghan National Security Force personnel.

One of the Australian soldiers, along with the coalition soldier, was flown to a nearby medical base.

The other three soldiers were being treated at Tarin Kot.

The patrol uncovered three other IEDs at the site.

The Defence Department said the area was cordoned off to avoid civilian casualties.

Details about the condition of the soldiers have not been released. Their families have been notified.