Cape Town - Celebrities such as Piers Morgan and Rihanna have reacted with shock at the news of a mass shooting at a midnight screening of The Dark Knight Rises in Denver, Colorado.
Two masked gunmen are reported to have opened fire and released teargas in a crowded cinema in the town of Aurora, Colorado in the US.
Police are reported to have arrested one of the men, who was caught with a number of high calibre weapons. His accomplice is believed to be on the run.
TV host and journalist Piers Morgan reacted with outrage to the shocking incident:
"Horrendous details from this Colorado cinema shooting. America has got to do something about its gun laws. Now is the time," he posted as @piersmorgan.
He followed this up with: "More Americans will buy guns after this, to defend themselves, and so the dangerous spiral descends. When/how does it stop?", which sparked a wave of criticism from the CNN host's followers.
Comedian and Think Like a Man star Kevin Hart @KevinHart4real wrote: "just heard about the Shooting n Denver @ the movie theater, my prayers go out 2 the family members of the victims of this terrible tragedy (sic)"
Actor @JohnLeguizamo was also concerned about the gun laws in the US: "My heart goes 2 all the victims families in colorado. No one should have to go thru that. When r we gonna get guns removed in this country?! (sic)"
"Praying for the people of Aurora, Colorado," wrote hip-hop mogul Russell Simmons, tweeting as @UncleRUSH.
"Such awful, awful news this morning. All those people. It's so, so important we take care of each other. Thinking of the people of Denver," wrote Raising Hope actress @MarthaPlimpton.
The Lord of the Rings star Dominic Monaghan (as @DomsWildThings) wrote: "Denver you are in our thoughts."
His words were echoed by Shaun of the Dead director @edgarwright.
US President Barack Obama and First Lady Michelle Obama also voiced their support for the victims of the tragedy.