"Michelle and I are shocked and saddened by the horrific and tragic shooting in Colorado. Federal and local law enforcement are still responding, and my administration will do everything that we can to support the people of Aurora in this extraordinarily difficult time. We are committed to bringing whoever was responsible to justice, ensuring the safety of our people, and caring for those who have been wounded. As we do when confronted by moments of darkness and challenge, we must now come together as one American family. All of us must have the people of Aurora in our thoughts and prayers as they confront the loss of family, friends, and neighbors, and we must stand together with them in the challenging hours and days to come."
President Barack Obama
"Ann and I are deeply saddened by the news of the senseless violence that took the lives of 15 people in Colorado and injured dozens more. We are praying for the families and loved ones of the victims during this time of deep shock and immense grief. We expect that the person responsible for this terrible crime will be quickly brought to justice."
Republican presidential candidate Mitt Romney
"Speaking on behalf of the cast and crew of 'The Dark Knight Rises,' I would like to express our profound sorrow at the senseless tragedy that has befallen the entire Aurora community. I would not presume to know anything about the victims of the shooting but that they were there last night to watch a movie. I believe movies are one of the great American art forms and the shared experience of watching a story unfold on screen is an important and joyful pastime. The movie theatre is my home, and the idea that someone would violate that innocent and hopeful place in such an unbearably savage way is devastating to me. Nothing any of us can say could ever adequately express our feelings for the innocent victims of this appalling crime, but our thoughts are with them and their families."
Director Christopher Nolan
"Our hearts and prayers go out to the victims of this despicable act and their families. We are grateful for the quick and effective response by police and emergency personnel. Guest safety is, and will continue to be a priority for theater owners. NATO members are working closely with local law enforcement agencies and reviewing security procedures."
National Association of Theatre Owners
"The Department of Defense is deeply saddened by the news of the tragic incident at the Aurora Mall Movie Theater in Aurora, Colo. Our thoughts and prayers are with the victims and the families of those impacted by this event."
Department of Defense
"You know, soothing words are nice, but maybe it's time that the two people who want to be president of the United States stand up and tell us what they are going to do about it, because this is obviously a problem across the country. And everybody always says, `Isn't it tragic,' and you know, we look for was the guy, as you said, maybe trying to recreate Batman. I mean, there are so many murders with guns every day, it's just got to stop. And instead of the two people - President Obama and Gov. Romney - talking in broad things about they want to make the world a better place, okay, tell us how."
New York City Mayor Michael Bloomberg
"As local law enforcement, first responders, and medical professionals work tirelessly in the aftermath, the federal government will be a partner. As families confront this tragedy, the nation and its leaders are praying for them."
House Minority Leader Nancy Pelosi, D-Calif.
"This senseless massacre of so many innocent people gathered with friends and family in a movie theater reminds us not only of the great evil that exists in the hearts of some, but of the great and precious gift of life."
Senate Minority Leader Mitch McConnell, R-Ky.
"I am deeply saddened by the terrible shooting in Aurora, Colorado. Federal, state, and local law enforcement agencies continue to respond to this horrific event and I have directed the Department of Homeland Security to provide any support necessary in the ongoing investigation. We are committed to bringing those responsible to justice. Our hearts and prayers go out to anyone impacted by this tragedy, especially the family and friends of those killed or injured."
Homeland Security Secretary Janet Napolitano
"This is not only an act of extreme violence, it is also an act of depravity. It is beyond the power of words to fully express our sorrow this morning. Our prayers and condolences go first to the families of those killed, and we share the grief of everyone affected by this senseless event. We appreciate the swift work by local, state and federal law enforcement. Coloradans have a remarkable ability to support one another in times of crisis. This one of those times."
Colorado Gov. John Hickenlooper
"This was horrible, senseless and abhorrent act. My family and I are shocked and deeply saddened this morning and our hearts are with the victims and their families. My staff and I are in contact with and offering our support to law enforcement and medical officials as they respond to the shooting."
Sen. Michael Bennet, D-Colo.
"My thoughts and prayers go out to all of the victims and their families in this senseless act of violence. I've lived in Aurora almost all of my life and nothing like this has ever happened here. This was the type of violence that I would have expected when I served in Iraq with the U.S. Marine Corps but never here at home."
Rep. Mike Coffman, R-Colo.
"As someone who has suffered the lasting impact of gun violence, and president of Brady, I can tell you that we don't want sympathy. We want action. Just this past April 16, the anniversary of the worst mass shooting in American history, 32 victims of gun violence joined us to demand Congress take action to stop arming dangerous people."
Dan Gross, president of Brady Campaign.
"Warner Bros. and the filmmakers are deeply saddened to learn about this shocking incident. We extend our sincere sympathies to the families and loved ones of the victims at this tragic time."
"I was saddened to learn of the tragic loss of life earlier today in Denver, Colorado. Prince Philip joins me in extending our heartfelt sympathy to you and the people of America at this time. My thoughts and prayers are with the families of those killed and I wish the many who were injured a swift and full recovery."