An investigation is under way into where a powerful date rape drug may have come from amid reports by two University of Montana students that they were sexually assaulted by men — aided by the drug.

Some medical experts say recipes for drugs similar to Rohypnol may include household ingredients. That could make efforts to locate a supplier for drugs allegedly used in crimes potentially very difficult. First Step Resource Center registered nurse Cat Otway says that even over-the-counter medicines mixed with alcohol can be used as date-rape drugs.

The University of Montana has already enlisted an outside investigator to pursue allegations lodged earlier this month that two female students had been attacked.

Story From Associated Press

More From KMPT-AM