Sources tell CBS News that authorities are seeking an indictment against Congressman William Jefferson, D-La., on more than a dozen counts involving public corruption.

Jefferson has been the subject of a ongoing probe in which FBI agents allegedly found more than $90,000 in cash in his freezer in August 2005.

CBS News correspondent Bob Orr reports that the Justice Department is expected to unveil the charges later today.

This was the latest development in the 16-month international investigation of Jefferson, who allegedly accepted $100,000 from a telecommunications businessman, $90,000 of which was later recovered from a freezer in the congressman's Louisiana home.