This is today's memo from University of Arizona president Robert Shelton:

To the University Community,

Saturday's tragic shooting in Tucson, which critically wounded Rep. Gabrielle Giffords and resulted in six deaths, is having a profound effect on the University of Arizona community. I want all of our students, faculty and staff to know that the full resources of the UA are available to anyone who is personally impacted by this tragedy.

Please join me in extending our prayers and best wishes to the victims of this unspeakable attack, along with their families.

The medical professionals at UMC have provided extraordinary care to Rep. Giffords and many of the other victims. We are confident that they all are getting the best care possible at UMC.

For years, Gabrielle Giffords has been a tremendous friend of the University of Arizona, and in her two terms in Congress has worked tirelessly on behalf of education. She has always been a voice of moderation, which makes this shooting even more difficult to comprehend.

U.S. District Judge John Roll, a UA alumnus and Arizona's chief federal judge, lost his life on Saturday as a result of this tragedy. He is remembered by his colleagues and friends as a brilliant jurist, a devoted family man, a person of faith and a gentleman.

Daniel Hernandez, a UA junior and an intern for Rep. Giffords, was at the scene of the shooting and provided live-saving first aid prior to the arrival of medical personnel. Thankfully, he was not injured. I thank him for his courageous and heroic efforts during a time of crisis.

Finally, I know that many of you personally know some of the victims, live in the area where the shooting occurred or have ties to the police, fire and medical personnel who are heroically serving.

In one way or another, the entire UA campus community has been shaken by this tragedy. I encourage you to look out for one another - our classmates, colleagues and friends - as we all cope with the grief and uncertainty that accompanies such an egregious act of violence.

Please remember that students may obtain services from Counseling and Psychological Services and that our Life & Work Connections program is available to UA faculty and staff.

To access counseling services, call 520-621-3334 (Counseling and Psychological Services) or 520-621-2493 (Life & Work Connections).

We will continue to keep you informed of new developments, the conditions of the victims at UMC and additional resources available to the campus community.

Robert N. Shelton