UNITED NEWS INTERNATIONAL (UNI) — Up to 2,000 frozen eggs and embryos may have been damaged by a sudden rise in temperature in a fertility clinic freezer.

It’s unclear whether those samples in Cleveland, Ohio, are still viable.

Patti DePompei with University Hospitals says officials have begun reaching out to each affected patient.

In a video message shared through Facebook, she said, “We are so very sorry this happened, and we want to do all that we can to support our patients and families through this very difficult time.”

Television station WKYC reports the hospital may waive the cost of future treatment for those patients.

UH has already launched an investigation to find out what caused the temperature to fluctuate some time after staff left the clinic Saturday night, March 3, and before they returned on Sunday morning.

In the meantime, The Plain Dealer reports the samples have been moved to another storage tank where they will be monitored around the clock.