University Health Services (UHS) received two bomb threats by telephone Monday, according to an internal e-mail from UHS Director David S. Rosenthal ’59.

Both threats came from internal UHS extensions, Rosenthal wrote in an e-mail to all UHS staff. Both calls were made to the internal medicine division of UHS, according to a UHS employee who asked not to be named.

No UHS facilities were evacuated following the threats—a decision which drew some criticism.

“Our lives are in danger, as well as the patients’ lives,” said the UHS employee.

But Rosenthal, who is currently out of the country, wrote in his e-mail to the staff that the bomb threats were not a danger.

“The Harvard Police were called immediately, and quickly determined that the threats were not credible,” Rosenthal wrote.

Harvard University Police Department (HUPD) detectives interviewed several UHS employees after the threats. Security guards at UHS were not aware of the bomb threats.

At a meeting Wednesday, HUPD detectives and UHS Assistant Director of Clinical Operations Kathleen Tracy met with staff of the internal medicine division to discuss the bomb threats, according to the unnamed UHS employee.

Tracy did not return repeated calls for comment.

HUPD spokesperson Steven G. Catalano declined comment because of the ongoing investigation.

—Staff writer Stephanie M. Skier can be reached at skier@fas.harvard.edu.