Trinity College has temporarily suspended all activities of the Kappa Kappa Gamma sorority, according to a message sent from the institution’s president, Jimmy Jones, to the college community on Thursday.

Jones says there is an “investigation into an alleged violation of College rules forbidding pledging, hazing, and unregistered social events.”

The investigation follows an anonymous tip placed to the Hartford Police Department on November 14, 2013. The concern is “that the sorority was putting new members in danger.”

After an initial investigation from Dean Card, it was determined to be serious enough to require a closer look.