WASHINGTON  Conservative bloggers and opinion outlets in recent days have expressed mounting alarm about an executive order by President Obama that extended certain privileges and immunities to the International Criminal Police Organization, better known as Interpol.

Bloggers have accused Mr. Obama of ceding American sovereignty, painting a portrait of an international police force operating on United States soil without legal restraints. They have also argued that the order is part of a plot to allow international courts to arrest and prosecute American officials for war crimes.

That theme is making its way from the blogosphere to more mainstream news outlets.

In a Web post for the conservative National Review last week, the commentator Andrew C. McCarthy declared that an “international police force” could now operate inside the United States “unrestrained by the U.S. Constitution and American law.” He also suggested that the order created in the Justice Department “a repository for stashing government files” beyond the reach of Congress and the public.

And an editorial in The Washington Examiner this week declared that “this new directive from Obama may be the most destructive blow ever struck against American constitutional civil liberties.”