After learning that LSU was looking into policy violations, the national office of Kappa Sigma purged members from the campus chapter in what it calls a “membership review.”

LSU wouldn't specify the allegations or explain what policies were violated. But five other fraternities on campus have been disciplined – including dozens of the members being expelled from the social organizations – over the past few years because of allegations of bad behavior. 

"LSU was made aware of allegations of violations of university policy last fall, and immediately began to work through our formal process. The national organization of Kappa Sigma also undertook its own investigation. Any actions to date were taken voluntarily by the national organization," LSU spokesman Ernie Ballard said Wednesday in an emailed statement.

“The Kappa Sigma Fraternity has received allegations that some of the members of the Kappa Sigma Chapter at LSU may have participated in activities that violated the Code of Conduct of Kappa Sigma Fraternity,” Mitchell B. Wilson, executive director at the fraternity’s international headquarters in Charlottesville, Va., said in prepared statement late Tuesday night.

Kappa Sigma, formed in 1869, touts itself as “the largest college social fraternity in the world” with more than 200,000 members. The LSU chapter has about 100 undergraduate members.

Wilson also refused to provide any details about the alleged infractions, provide a count of those expelled or say how the LSU members were disciplined. He said disciplinary actions are a private matter.

Four alumni familiar with situation, but not wishing to be identified because they were not authorized by the national office to comment, said the national group sent a committee to Baton Rouge in late January, rented a meeting room at the Louisiana State Police headquarters and interviewed members targeted for expulsion.

All four said they were unaware of any coordinated hazing or drug-related events. About two dozen members were cast out for infractions described as insubordination and conduct unbecoming. A good number of those asked to explain their actions to the national panel had stopped paying their dues and hadn’t participated in the fraternity’s events for some time, two of the alumni said, adding that a lot of those targeted didn’t show up for their interviews.

A few apparently left voluntarily because the fraternity instituted a drug screening policy earlier this year, said one of the alum.

Five LSU fraternities have been suspended – and dozens of its members expelled – since 2014 for incidents involving hazing, drug use, and overdrinking that led to injuries and death.

Kappa Sigma was not among those frats cited. But LSU records list several violations for September and October 2015. Records for 2016 were not immediately available. One assertion claimed that new members were paddled to the point of bleeding and another investigation found that two members had branded themselves voluntarily.

The LSU Kappa Sigma chapter is in the midst of building a $6 million house on Dalrymple Drive. The 23,000 square-foot, three story building is expected to house 52 fraternity members and is slated for completion in August.

Follow Mark Ballard on Twitter, @MarkBallardCnb.