Two Canadian fighter jets spent New Year's Eve bombing militants' positions in Iraq as part of a international airstrike campaign.

The Defence Department says that on Dec. 31 the two CF-18s struck ISIS fighting positions using precision-guided munitions.

The planes were acting in support of Iraqi security forces' group operations west of Fallujah.

According to information posted by the American and Australian governments, the targets hit in that area were tactical units belonging to the Islamic State in Iraq and Syria group.

The group, which has declared a self-styled caliphate, holds about a third of Iraq and neighbouring Syria.

The U.S. government says fighter planes and drones also conducted airstrikes in Syria on Dec. 31, destroying oil derricks, ISIS buildings and fighting positions.