The Offices of the Dean of Students is conducting an official investigation into the Sigma Phi Epsilon fraternity, university officials announced Tuesday.

According to University Communications spokesperson John Lucas, the DOS office received a complaint about the fraternity and sent staff to visit the house Monday evening.

Sig Ep president Mike Mielsen said the complaint, which alleges the fraternity was practicing hazing-like behavior at their house at 237 Langdon St., was inaccurate.

“I met with Kevin Helmkamp and two other associate deans, and they spoke to many members of our house on Monday night and came to the very clear conclusion that we did not haze,” he said.

However, Mielsen said the fraternity’s activation of new members ceremony occurred May 2 and following the ceremony, some Sig Ep members engaged in an inappropriate manner.

“After the activation, there was an event that was not condoned by myself or the other fraternity leadership that was irresponsible, and immature and we’re taking the correct steps so that it never happens again,” he said.

Lucas said the Committee on Student Organizations and the Greek Judicial Board would likely deal with any conduct issues regarding the fraternity.