The Rev. Timothy Lannon, Creighton University's president, was hospitalized after becoming ill during a Thanksgiving mass.
Lannon was performing the mass Thursday at St. John's Church on the Creighton campus when he said he wasn't feeling well.
Two physicians who attended the mass advised Lannon to go to Creighton University Medical Center for an evaluation. He was admitted.
Creighton officials said Sunday that Lannon was undergoing tests. His condition was not released by hospital staff.
In a letter to Creighton faculty, staff and students, Creighton Provost Ed O'Connor and Dan Burkey, senior vice president for operations, said Lannon's personal physician has encouraged him to take some time off.
“With the semester coming to an end, this is a natural time to do that,” they wrote. “We hope you will join us in wishing Fr. Lannon a speedy recovery.”
Lannon is Creighton's 24th president. He was named to the helm in July 2011.
Lannon, who turns 63 on Monday, earned a math degree from Creighton in 1973. He is the university's first alumnus to serve as president.