AURORA, Colo. - A spokeswoman for Swedish Hospital said the hospital went on alert at 1:15 a.m. and began calling in extra staff.
Swedish Hospital received three patients, all of them with gunshot wounds. Two patients were in surgery as of 4 a.m.
Those victims are a 20-year-old woman and a 29-year-old man. Both were in critical condition and in surgery at 4 a.m., according to a hospital spokeswoman.
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The third victim was treated and released. University Hospital said it has 20 victims with minor to severe injuries.
Nine of those victims are critical.
The victims taken to University Hospital are mostly adults, but some are teenagers.
The youngest victim was a 3-month-old child.
Children's Hospital told 7NEWS it was treating six victims from the theaters. They range in age from six to 31.
Denver Health said it took six patients from the Aurora shooting. One is in critical condition and the other five are in fair condition. More victims were taken to Aurora South Hospital.
President Barack Obama said he was "shocked and saddened" when he learned about the shooting. He is urging the nation to "come together as one American family."