The University of the Fraser Valley is warning students about condoms that may have been tampered with, which were offered for free in public washrooms at various student centres in Abbotsford and Chilliwack from Sept. 1 onwards.

"Someone did come to us and said they believed they saw someone tampering with the condoms and we began to act immediately," said university spokesman Darren McDonald.

"It looks right now as if someone had used a pin and maybe put pin holes in some of the wrapped condoms that were available for free."

McDonald said the university was made aware of the incident Friday afternoon.

"Please be advised, they may not be effective as birth control or as protection against sexually transmitted diseases," the university wrote on its website Friday.

Students concerned about their health should contact their family doctor or a health clinic, the university said.

The condoms that may have been affected were available at the following locations:

All washrooms on all floors of the SUB Building on the Abbotsford Campus.

The Peer Resource and Leadership Centre area in the SUB Building in Abbotsford.

The reception area of Baker House residence in Abbotsford.

The Student Life Lounge in Building A at the Chilliwack campus.

The university said it has removed the remaining 250 condoms at those locations, and they will not be replaced.

The university is investigating the incident.