Brazilian police revealed on Sunday that they foiled a terrorist attack that would target Lady Gaga's record-breaking concert on the Copacabana beach in Rio de Janeiro.

The Rio de Janeiro State Civil Police and Brazilian Justice Department announced two arrests the day after the concert, adding that the suspects were planning a bomb attack at the concert, which attracted an estimated 2.5 million people.

According to police (via Reuters), the plot was carefully planned by a team that “promotes hate speech (opposing the LGBTQ community) and teen radicalization.”

"The suspect is recruiting participants, including minors, to use simple explosives and Molotov cocktails for coordinated attacks," police said in a statement. "The program is seen as a 'collective challenge' with the goal of being notorious on social media."

A male suspect described as the leader of the group was arrested for illegal possession of a firearm, while a teenager in Rio de Janeiro was detained for storing child pornography.

"We learned about this alleged threat through media coverage this morning," a Gaga spokesperson said in a statement on Sunday. "There were no known security issues before and during the show, and no communication between the police or authorities and Lady Gaga about any potential risks. Her team worked closely with law enforcement throughout the concert planning and execution, and all parties were confident about the security measures implemented."

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Authorities called the investigation "Operation Fake Monsters," a tribute to Gaga's Little Monsters fan base - a search warrant for 15 other suspects nationwide, confiscating telephones and other electronic devices.

The Justice Department's Network Operations Laboratory discovered the plot after a prompt from the Rio State Police Intelligence Department, which found digital cells online to encourage violence against attendees on Copacabana Beach.