WASHINGTON (AP) — A Senate panel says Apple Inc. is avoiding billions of dollars in U.S. taxes by shifting profits to foreign affiliates and is prepared to question the company's chief executive Tuesday about the "loopholes."

By John Whitesides and Kim Dixon WASHINGTON (Reuters) - Top Internal Revenue Service officials told Congress on Tuesday they were unaware of the agency's targeting of conservative groups for extra tax scrutiny until recently and were not deliberately misleading lawmakers last year when they did not reveal the practice. Exasperated senators questioned the truthfulness of former IRS Commissioner Douglas Shulman, who led the agency from 2008 to 2012, and outgoing acting IRS chief Steven Miller. Republican Senator Orrin Hatch of Utah accused IRS leaders of a "lie by omission. ...