Harvard University said it has found additional instances of insufficient citations by school president Claudine Gay — as a congressional committee announced it will investigate mounting allegations of plagiarism against her. The Ivy League school said Wednesday that a recent review uncovered more “examples of duplicative language without appropriate attribution” in Gray’s 1997 doctoral dissertation, according to the Boston Globe, which obtained a summary of the report. “President Gay will update her dissertation correcting these instances of inadequate citation,” the summary stated, with the Harvard Crimson saying it involved three other corrections to those already made to her work. The...