BOSTON — A federal judge has ruled that Glenn Beck must disclose the names of confidential sources he used while reporting that a Saudi Arabian student was involved in the Boston Marathon bombing.

Judge Patti Saris ruled Tuesday in a defamation lawsuit filed by Abdulrahman Alharbi, who was injured in the 2013 deadly bombing.

The conservative commentator continued to report that Alharbi was involved in the attack after federal officials said publicly he was not.