Planned “takeover” events at New Hampshire’s Hampton Beach erupted into multiple physical fights Tuesday, officials said.

Authorities were prepared for the day, as two “Hampton Beach Takeover” events and several school skip days had been advertised on social media, Hampton Police Chief Alexander Reno told Boston.com in a statement. 

These “takeover” events typically “devolve into drinking, fighting, disorderly, and generally unsafe behavior,” he said. 

Authorities had already organized a crowd control response team, as several thousands of visitors were enjoying the beach, according to Reno. 

The situation shifted shortly before 4 p.m. when heavy rain forced hundreds of beachgoers to seek shelter. It was during this time that physical altercations “began popping off,” with numerous fights “breaking out all at once” within the Hampton Beach Casino and Bandshell Complex, Reno said. 

New Hampshire State Police’s Special Events Response Team assisted with what they described as an “unlawful assembly” and wore tactical gear, according to a statement posted on Facebook. 

“While Troopers are committed to ensuring the safety of all beachgoers, any observed criminal behavior could lead to citations or arrests,” the statement reads.  

Officers formed a “skirmish line” and moved the “riotous” crowd north on Ocean Boulevard, Reno said. 

Patrols were maintained throughout the night. As the sun returned, Reno noted a “resurgence of these grounds.” 

Police said they formed a second “skirmish line” around 8:20 p.m., dispersing several hundred additional disorderly individuals.

“This second push was more expansive but less dynamic,” Reno said.

The area was cleared by police units around 9:40 p.m. 

During these “takeovers,” several arrests took place. Reno said police ultimately managed 127 service calls and conducted 50 total arrests. 

The charges included 18 counts of unlawful alcohol possession, 13 for rioting, five for minors transporting alcohol, three DUIs, and one for second-degree assault, authorities said. 

“Those who came to our community with the intent to engage in unlawful and unsafe behavior will be prosecuted to the fullest extent possible,” Reno said. 

No serious injuries were reported, police said.

“While we hope that this type of response is not needed, I believe that the preparation that went into yesterday significantly increased our chances for success,” Reno said. “Our officers worked very hard to maintain peace, law, and order, and I’m incredibly proud of them all.” 

The investigation is still ongoing, authorities said, and investigators are currently analyzing available video footage to see if more charges should be filed.

Law enforcement noted that a minor section of the beach was impacted; however, they did not clarify the specific location or the nature of the impact.

“Hampton remains a safe community with a lot to offer visitors,” Reno said. “The public can expect to continue to see a large police presence at the beach this summer as we continue to strictly enforce our laws.”