Washington: There is no indication that the shooters who killed 14 people in California are part of a larger terrorist group, the White House said Saturday, even as the Islamic State claimed the pair were "soldiers" of its caliphate.

A team of top officials including FBI Director James Comey, Attorney General Loretta Lynch and Secretary of Homeland Security Jeh Johnson told President Barack Obama "that they had as of yet uncovered no indication the killers were part of an organized group or formed part of a broader terrorist cell," but pointed to evidence that they had been "radicalized to violence," the White House said in a statement.