US President Donald Trump said Friday that US-backed coalition forces had won back almost 100 percent of territory occupied by the Islamic State group in Iraq and Syria.

"The coalition to defeat ISIS has retaken almost 100 percent of the territory once held by these killers in Iraq and Syria," Trump said in a speech at the World Economic Forum in Davos, Switzerland.

The president also noted that the US will try to ensure that Afghanistan never again becomes a haven for terrorists.