WASHINGTON - The Pentagon has sent the White House a preliminary plan to defeat the Islamic State (IS), a spokesman said Monday, without providing details about the plan.

Pentagon spokesman Jeff Davis said the plan is a framework for a broader plan to defeat the IS extremists, adding that the details of the draft are classified secret.

US Defense Secretary Jim Mattis will brief senior administration officials on the draft later Monday.

The draft plan came about a month after US President Donald Trump ordered the Pentagon to come up with a plan to defeat the IS. He has repeatedly criticized the Obama administration for failing to stop the extremist group during last year's campaign.

On Jan 21 in his first official visit to the Central Intelligence Agency, Trump vowed that "radical Islamic terrorism" has to be eradicated "right now."

Trump described "radical Islamic terrorism" as "evil" unseen before, adding that it should be "eradicated just off the face of the earth."