US Defence Secretary Ash Carter has announced the deployment of additional troops to support Iraqi forces in the fight against ISIS.

According to Carter, 560 more personnel will be sent to Iraq to help local forces that aim to free Mosul from ISIS.

The decision to extend support to Iraqi forces is based on a recommendation made by the Defence Secretary, as well as Joint Chiefs of Staff Chairman Joseph Dunford, US Central Command commander General Joseph Votel, and Operation Inherent Resolve commander lieutenant general Sean MacFarland.

"These additional US forces will bring unique capabilities to the campaign and provide critical enabler support to Iraqi forces."

The latest deployment will bring the number of US personnel in Iraq to more than 4,650, the BBC reported.

The troops are expected to provide support in areas such as infrastructure and logistics at an airfield near Qayyarah.

Carter said: "With the retaking of Qayyarah West airfield, the Iraqi security forces have once again demonstrated a serious will to fight.

"These additional US forces will bring unique capabilities to the campaign and provide critical enabler support to Iraqi forces at a key moment in the fight."

The US is committed to supporting the Iraqi Government’s efforts to protect its civilians from ISIS terror attacks.

American forces are already sharing intelligence with their Iraqi counterparts.

Carter said that the Joint Improvised-Threat Defeat Agency, which leads the US Department of Defense's efforts to combat improvised explosive devices, would provide additional assistance to improve security in Baghdad.