Controlled demolition brings down Riviera casino in Las Vegas

LAS VEGAS (NBC) - A planned demolition took down an iconic casino in Las Vegas Tuesday morning, but it didn’t go quite according to plan.

Though crews were on hand to take down the taller of two towers at The Riviera, the flood lights set up to show the demolition cut out at the last moment.

The scene had been set with planned fireworks before crews  were set to implode the building.

Then it was time for the big moment. But after the first charges blew, the lights cut off, and the implosion happened in the dark, leaving spectators confused.

Other images gave a better view of the demolition, but there has been no explanation for why the lights cut off at that precise moment.

Officials with the Las Vegas Convention and Visitors Authority say the implosion wasn’t really supposed to be a spectator event.