By Andrew Hay

Oct 22 (Reuters) - The University of Arizona has suspended a fraternity after a female student ‌alleged she was raped at its house by two ‌men, the latest action taken by a major US university against a Greek ​chapter over accusations of sexual assault.

The university suspended Sigma Phi Epsilon, which was already on probation for hazing new members, on Wednesday after the KOLD-TV station reported the allegations of a female ‌student who said she ⁠was raped at the chapter's fraternity house in Tucson. The university said it was investigating.

"It ⁠has been determined that your organization presents a substantial risk to members of the university community," Whitney Mohr, associate dean of students, ​said ​in a letter to the ​fraternity.

The female student told police ‌she was at the Sigma Phi Epsilon fraternity house with friends and...