Just one week before UFC 301, the Brazilian police reportedly launched a "major operation" within the country, making fans concerned about the event's host city.According to reports, the law enforcement operation targeted an unnamed organized crime group in Rio de Janeiro. UFC employee RJ Clifford expressed his concern for the situation on X, prompting fans to chime in with their opinions.Clifford's quote-tweet post showed a video from a Brazilian citizen capturing smoke rising into the air from an assumed attack. No news sites released any information on the organized crime group other than identifying it as "one of the largest" in the area.One fan called the scene a "war zone," responding with:"Sounds like a full-blown warzone and dude is just chillin' on his metal roof watching like it's the New Year's fireworks lol"Despite some fans' concerns, many citizens of Brazil pointed out that such activity is considered normal in the area and not problematic. Others also noted that the area filmed in the video was not close to the Farmasi Arena, where UFC 301 is scheduled to occur.Other fans commented:"Dang those bonuses better be good""Ask Anderson [Silva] to get you a gun""Not even anywhere close to where the UFC is being held lol just a post for bait engagement?""Pack your helmet and flak jacket"View more fan reactions to the Brazilian police operation below: Fans reacting to the Brazilian police operation targeting organized crime [via @rjcliffordmma on X]UFC 301 full fight cardIn his second title defense, UFC flyweight champion Alexandre Pantoja will headline UFC 301 in his home country against the current No.10-ranked contender, Steve Erceg.The card is full of Brazilian fighters looking to climb the rankings in front of their home crowd. As it currently stands, the event will have 14 fights, including a five-fight pay-per-view.Main card (10 p.m. ET / 11 p.m. Brasilia Time)(C) Alexandre Pantoja vs. Steve ErcegJonathan Martinez vs. Jose AldoAnthony Smith vs. Vitor PetrinoMichel Pereira vs. Ihor PotieriaPaul Craig vs. Caio BorralhoPreliminary card (8 p.m. ET / 9 p.m. Brasilia Time) Joanderson Brito vs. Jack ShoreKarolina Kowalkiewicz vs. Iasmin LucindoElves Brenner vs. Myktybek OrolbaiJean Silva vs. William GomisEarly preliminary card (6 p.m. ET / 7 p.m. Brasilia Time) Drakkar Klose vs. Joaquim SilvaMauricio Ruffy vs. Jamie MullarkeyDione Barbosa vs. Ernesta KareckaiteIsmael Bonfim vs. Vinc PichelAlessandro Costa vs. Kevin Borjas