Citing box office insiders, The Hollywood Reporter, Los Angeles Times, New York Times and other media outlets reported Sunday that the latest Batman sequel earned $160 million to $162 million.

That amount would best the $158.4 million debut of The Dark Knight in 2008 and give Dark Knight Rises the third-highest domestic weekend opening ever after the 3D films The Avengers with $207.4 million and Harry Potter and the Deathly Hallows – Part 2 with $169.2 million.

The Hollywood Reporter also cited box office sources who said Dark Knight Rises earned $70 million from nine of the 17 countries where it debuted over the weekend, including the United Kingdom, Australia, South Korea and Spain.

Tickets for 3D films cost a few more dollars than 2D screenings, netting extra cash at the box office. Movies released in 3D typically earn under half of their income in 3D screenings, sometimes as little as a third.

Sony, Fox, Disney, Paramount, Universal and Lionsgate joined "Dark Knight Rises" distributor Warner Bros in publicly withholding their usual revenue reports out of respect for the victims and their families.

Box-office tracking service Rentrak also did not report figures following the Aurora, Colorado, shootings that killed 12 and injured 58 at a midnight screening of the new Batman sequel on Friday.

"This tragedy did not seem to impact the box office in a major way," said Paul Dergarabedian, an analyst for Hollywood.com who specialises in box office. "For this film to still be in the rarified air of the top-three openings of all time is phenomenal, given the unfortunate circumstances surrounding the release of this film."

Dergarabedian noted that the box-office ranking of director Christopher Nolan's final instalment of his Batman trilogy would not be official until Warner Bros. and other studios release their final weekend box-office tallies Monday.

Meanwhile, police in the Colorado have declined to confirm media reports that a Batman mask and poster were found in the apartment of alleged cinema gunman James Holmes.

CNN and the Los Angeles Times both cited sources as saying that a Batman mask and poster had been found in his apartment, which police only entered Saturday after defusing a complex system of booby traps.

But the Aurora Police Department declined to confirm or deny the reports.

"We are not talking about any of the evidence that was released, or obtained from the apartment," a spokesman told AFP, adding that he understood at least one media outlet claimed to have a long-lens image of the Batman items.

"We have no way to confirm it. All the evidence that was obtained was taken away and filed," he added.