GUELPH -- Police are investigating multiple reports of female students possibly having their drinks spiked with an unknown substance at the University of Guelph.

In a release, Guelph police say two women submitted complaints related to a recent house party in the south end of the city Friday evening.

Two other women reported similar incidents related to a small on-campus gathering last month.

The university said the students felt unwell after consuming their drinks.

Police say no assaults or physical injuries have been reported.

Investigators don’t believe the two complaints are related and are investigating them as separate incidents.

“The University takes such situations seriously. We strive to provide living, working, and learning environments that are safe, respectful, and free of all acts of violence, including sexual violence,” the school said in a statement on its website. “We are reminding students of the need to be vigilant. People who believe that they have been victimized or have information to share about these incidents are asked to contact the CSO office at (519) 840-5000, Ext. 2000.”

Police say they’re working collaboratively with campus police and are asking anyone with information to give them a call.

They also provided a list of safety tips for students. They include:

  • Avoid situations you are uncomfortable with
  • Never accept a drink from someone you don’t completely trust
  • Do not drink something you didn’t see being opened or poured
  • Do not leave your drink unattended
  • When drinking from a bottle keep your thumb over the top

Police say everyone should be aware of their alcohol tolerance, and while symptoms may vary, victims often report blurred vision and memory loss. The effects can also start within minutes of consuming the drink.

Warning signs could include:

  • Feeling dizzy or faint
  • Feeling sick or sleepy
  • Feeling intoxicated or confused after consuming a small amount of alcohol
  • Passing out
  • Waking up feeling uncomfortable or disoriented, with memory blanks

Police shared this advice for anyone who suspects they've been drugged:

  • If you begin to feel drunk after one or two drinks, seek help from a trusted friend or staff member of the establishment and get to a place of safety as soon as possible
  • Report the incident to police as soon as possible. Most drugs leave the system very quickly, so the sooner an incident is reported the more likely testing can confirm their presence.

SEVERAL LARGE GATHERINGS OVER WEEKEND

The University of Guelph is also asking students to follow gathering limits of up to 25 people, after several large unofficial gatherings were reported on campus over the weekend and incilude incidents of aggressive physical behaviour.

The university says some of its property was damaged and tickets have been issued.

With reporting from CTV Kitchener's Stephanie Villella