There are serious security concerns about the Rio Olympics, but it appears officials are ahead of the game, maybe even more than they realize.

MORE: Everything that's wrong with the Rio Olympics

Officials lost the keys to the Maracana, the Olympic stadium that will host the opening ceremony on Friday, and had to call for firefighters to open the main entrance with bolt cutters.

What a start! #Rio2016 kicking off with lost key and firemen forcing open lock to east gate of Olympic stadium #oops pic.twitter.com/7yj0moF9Ms — Julia Carneiro (@juliadcarneiro) August 3, 2016

The Summer Games are off to an interesting start, even before the official start.