Updated: Aug. 28, 2014 at 5:22 p.m.

The Metropolitan Police Department is leading an investigation into a report that a male student sexually assaulted another student in the Phi Sigma Kappa house at 601 21st St.

The University will work with the fraternity’s national organization “to conduct a thorough investigation,” according to a statement released Thursday. The fraternity house is privately owned.

“GW takes all allegations of sexual assault very seriously,” the statement read. “We do not have an update regarding any charges or sanctions.”

Michael Carey, the executive director of Phi Sigma Kappa’s national organization, said he had not been contacted by GW and could not comment further. Interfraternity Council president Peyton Zere did not return a request for comment.

Campus police had contacted the suspect Thursday, according to an alert GW released at 1:47 a.m. “The investigation is continuing at this time,” the alert read, adding that students with more information should contact MPD.

GW first alerted students Thursday at about 12:35 a.m., describing the suspect as a white man in his 20s with “shaggy blonde hair.” He was last seen wearing a flat-brimmed yellow ball cap, a pink polo shirt and blue shorts. His name may be “Sonny,” according to the first alert.

Colleen Murphy contributed reporting