The University chapter of Kappa Sigma fraternity has been sanctioned by its national body for violating the organization's code of conduct, chapter leadership said yesterday. Members of the fraternity and University officials declined to comment on the nature of the incident that brought about the sanctions. Mitchell Wilson, executive director of Kappa Sigma's national body, confirmed that the concern arose as a result of "inappropriate activities with the pledges," although he also declined to elaborate further. "It is an internal matter," he said, "but the chapter is not shutting down, and we are beginning the process now of moving forward with our sanctions." The chapter has not violated the fraternity's code of conduct in recent years and that reflected favorably on the chapter when the national body handed down its sanctions, Wilson said. Kappa Sigma was founded in 1869 by five University students and currently has chapters at more than 250 college campuses. The national Kappa Sigma headquarters is located in Charlottesville. The Office of the Dean of Students will address the violations with members of the fraternity, according to an e-mail from Michael Citro, assistant dean of students and director of fraternity and sorority life. "We remain committed to supporting and working closely with the undergraduate chapter next semester and in future years," he said.