BLOOMINGTON, Ind. (AP) — Indiana University says it has suspended the local chapter of the Alpha Tau Omega fraternity while it investigates a video purportedly showing a pledge performing a sex act on a woman during an apparent hazing ritual.

The university said Thursday the recording that surfaced on social media "appears to be credible video evidence" of the hazing allegations. IU suspended the Bloomington campus' Alpha Tau Omega chapter while it investigates. University spokesman Mark Land says the chapter's members can attend classes and aren't suspended from school.

Alpha Tau Omega's national CEO Wynn Smiley says the video "is highly offensive" and if the "vulgar incident" is confirmed, "swift disciplinary action will be taken" against those involved.

In June, the Indiana State University suspended the fraternity for violations including providing alcohol to minors.