"EX PASSES VANISHING BEFORE THE RAID STARTED"

#PokemonGO: About forty people in the city of Rio Claro, SP, Brazil received ex passes for a raid that was supposed to happen at 12 pm (BRT/-3GTM) at a gym located at downtown. At midnight BRT the passes of all members that received vanished. At 11 am BRT it was reported that a eggxecutor raid is happening at the gym. So it is confirmed that the mewtwo raid was canceled and no one knows why. We asked on Facebook to fellow Brazilians from other cities if the same had happened but everything is normal with our fellow countrymen. We don't have a forecast of storm, we are about 5k km from any hurricane, and the Gym is located in a safe area. We even contacted the club that is where the gym is located about the event and they approved the event and even wished us good luck. We send many reports to Niantic but with no response so far.(http://ift.tt/2x3UOV6) Do you guys have any clue on what could have caused this?PS: I was not one of the forty lucky(or unlucky now) peeps that received the pass. But the PoGo community in the city is really big and active.PS 2: the gym was not removed from the game. is there and is under team Valor domain at the moment \o/Edit 1: add the comments about the approval of the event in the area.Edit 2:(minor text fixes) Add the update about the eggxecutor raid appearing instead the mewtwo raid. via /r/pokemongo http://ift.tt/2yNY9oC