ANN ARBOR, MI - A male University of Michigan student sustained injuries associated with being sexually assaulted and tested positive for a sedative called Benzodiazepine, which he said he had unknowingly ingested.

The man reported the alleged assault to University of Michigan police on April 11 in the 200 block of Fletcher Street in Ann Arbor, where he had been walking with friends at approximately 10 p.m. before they were joined in conversation by two other college-aged men.

The men invited the UM student to a large house party, where he was given and consumed a soft drink he was told was mixed with alcohol, according to police. He woke up the next day with little memory of the night, sustaining injuries associated with being sexually assaulted, he told police.

The first suspect, as described by a witness, was a black male between 6-foot-1 and 6-foot-2, with a solid build, approximately 21 or 22 years old with dark, clear complexion. He had dark, short hair, a well-formed beard on his chin with a mustache and was last seen wearing a black jacket. The man smelled of cologne and went by the name "Darnell."

The second suspect was described as a white male, between 5-foot-9 and 5-foot-10 with a thin build and approximately 21 or 22 years old. He had blonde hair, parted on the left with a swoop, was clean-shaven and was last seen wearing bright green basketball shoes. He went by the name "Sam."

Benzodiazepine, sometimes referred to as "benzos," is a depressant that produces sedation, induces sleep, relieves anxiety and muscle spasms and prevents seizures, according to the Drug Enforcement Administration.

Anyone with information regarding this incident should contact the University of Michigan Division of Public Safety & Security at 734-763-1131 or the confidential tip line at 1-800-863-1355.