Mourners have gathered together in groups large and small this weekend to pay tribute to the victims of the savage shootings on Friday in Auroro, Colo.

Twelve people were killed and 58 others were injured when a heavily armed gunman burst into a midnight screening of the film The Dark Knight Rises and opened fire in a packed movie theater in the Denver suburb of 325,000.

We're still reeling, Aurora Mayor Steve Hogan said at a memorial service for one young shooting victim on Saturday, according to Reuters.

Our culture needs to change, the Rev. Mauricio Bermudez said at a Mass at the Queen of Peace Catholic Church in Aurora on Sunday. What kind of people are we becoming? Today, we must change. Today is the day.

On Saturday night, mourners assembled behind the Century 16 Aurora theater, the site of the shooting, for an informal vigil. Some lit candles, others left flowers -- and many crafted signs memory of the victims.

Another vigil, a more formal one organized by community and religious leaders, is scheduled in front of the Aurora City Hall for Sunday night.