A drone dropped flyers featuring swastikas and slogans such as “the press is the enemy” outside an Ariana Grande concert and at a Sacramento State University event, according to the campus paper, the State Hornet.

The drone dropped the flyers on both sides of the Guy West Bridge around 6:30 p.m. on Friday during the university's annual “Bites on the Bridge” Farm-to-Fork dinner, according to the Hornet.

Police told BuzzFeed News that flyers were also found outside the Golden 1 Center arena, where the pop star Grande was performing.

Photos posted to social media show the leaflets, which boasted anti-media messages such as "The press is the enemy!" and images of swastikas.

Different forms of flyers were released over the event here a two different types. @TheStateHornet pic.twitter.com/g8Ua2Urreh — Dom_V. (@Dom_Vitiello) May 4, 2019

Some flyers included URLs for the “Red ‘X’ Society," which, according to BuzzFeed News, appears to be an obscure online group where the "Only Membership Requirement is in the Participation or Direct Action in Exposing US Corruption." The group is linked to Tracy Mapes, a Sacramento 57-year-old who was arrested for a similar incident two years ago.

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One version of the flyer has a watermark listing the material as copyright of Mapes, who was arrested in 2017 on suspicion of dropping similar leaflets over two NFL games in Oakland and Santa Clara, according to reports.

Sacramento State President Robert Nelsen, who was present at the university event, said in a statement Friday night that the university condemns the dissemination of "hate speech and propaganda."

“Sacramento State condemns in the strongest terms the dissemination of hate speech and propaganda Friday evening at our annual fundraising dinner on the Guy West Bridge,” Nelsen said. “The anonymous act of spreading such vile material is offensive and runs counter to the principles of inclusion and diversity practiced at Sac State. It did not stop the event, nor will it slow our march toward greater understanding and commitment to the rights and safety of our campus community.”

The dinner continued after the incident for about an hour and was otherwise uninterrupted, according to the Hornet. The Sacramento State Police Department will continue to investigate the incident.