At least 12 people were killed and another 58 wounded when a gunman opened fire during an early Friday morning screening of the new Batman movie at an Aurora, Colorado, theater, Police Chief Dan Oates told reporters. (Earlier, police said 14 were dead and 38 wounded.)

The heavily armed suspect has been identified as James Holmes, a 24-year-old Aurora resident who had been a doctoral student at the University of Colorado. He was arrested without putting up a fight at the theater moments after police arrived, Oates said.

Chaos broke out during the showing of "The Dark Knight Rises" at the Century Aurora 16 theater when the shooting began, police and witnesses said. A man told CNN affiliate KUSA that people were confused when the shooting started because many believed the sound of gunfire was coming from the movie.

According to Oates, Holmes' apartment housed a device with "incendiary devices, some chemical elements linked together with all kinds of wires."

Below are running updates: (See full story | Photos)

[Updated 11:00 p.m. ET] Some residents of Aurora, Colorado, gathered in community, prayer and faith late Friday to honor the victims of a shooting inside a local movie theater.

"Today, we came to pray. Today we came to heal," said Rhonda Fields, a Colorado state representative.

"This is a very sad situation. I don't know about you, but I'm shaken. We have 12 people that lost their lives just behind us ... I don't know what else to do but to pray," she said.

Fields spoke at an evening vigil that brought together various faith leaders, and which was held near where the shooting took place.

[Updated 9:43 p.m. ET] Twelve people are dead and 58 wounded following a mass shooting at an Aurora, Colorado, movie theater, police investigator Trevor Materasso told CNN by telephone Friday night. The toll given earlier by Police Chief Dan Oates during a press conference Friday night was incorrect, authorities said.

[Updated 9:27 p.m. ET] Chad Weinman, CEO of TacticalGear.com of Chesterfield, Missouri, told CNN that he believed his firm sold items to shooting suspect James Holmes.

The company checked its records after employees heard about the shooting and found a receipt matching Holmes' name and his Aurora, Colorado, address, Weinman said.

The receipt showed that Holmes bought an $106.99 Blackhawk urban assault vest, a $52.99 Blackhawk Omega Elite triple pistol magazine, a $52.99 Blackhawk Omega Elite M16 magazine pouch, and a $77.99 Blackhawk Be-Wharned silver knife.

With shipping costs, the total bill came to $306.99, according to a copy of the receipt provided to CNN.

The firm sells equipment to military and police personnel - as well as weekend warriors, Weinman said.

[Updated 9:24 p.m. ET] Authorities expect within the hour to have a complete list of casualties from the mass shooting at a movie theater and will begin the process of notifying families, Aurora Police Chief Dan Oates said.

[Updated 9:20 p.m. ET] The suspect is believed to have obtained all his guns and ammunition legally, Police Chief Dan Oates said.

[Updated 9:18 p.m. ET] The suspect is in Arapahoe County Jail, Police Chief Dan Oates said. He will have his first court appearance at 8:30 a.m. on Monday.

[Updated 9:15 p.m. ET] Five apartment buildings, including the suspect’s apartment building have been evacuated as police try to figure out how to get into the suspect’s booby-trapped apartment, Police Chief Dan Oates said. Police will not try to enter the apartment until at least Saturday.

[Updated 9:12 p.m. ET] The suspect purchased 6,000 rounds of ammo over the Internet, Police Chief Dan Oates said.

[Updated 9:11 p.m. ET] The last of the bodies were removed from the theater by 5 p.m. local time, Police Chief Dan Oates said.

[Updated 9:07 p.m. ET] As of 3:30 p.m. Mountain time, 11 shooting victims were in critical condition in local hospitals, Gov. John Hickenlooper said at a news conference. There were 30 victims still in hospitals in total, he said.

[Updated 7:26 p.m. ET] It is possible authorities may wind up using robots to blow up the booby traps and explosives inside the shooting suspect's apartment because it may be too dangerous to send people in to do it, a law enforcement source tells CNN’s Susan Candiotti.

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