NASHUA, N.H. — A gunman opened fire in a New Hampshire country club on Saturday as a wedding was taking place, killing one person and wounding two others, authorities said. A suspect is in custody.

The person who died at the Sky Meadow Country Club in Nashua was a 59-year-old man identified as Robert Steven DeCesare, according to New Hampshire Attorney General John Formella and Nashua Police Chief Kevin Rourke.

Authorities identified the suspect as Hunter Nadeau, age 23, and said he had been arrested and charged with one count of second-degree murder for knowingly shooting DeCesare.

Additional charges likely will be brought, including for the additional shooting victims, Formella and Rourke said in a statement. They said they expect Nadeau to be arraigned at the Ninth Circuit Court in Nashua on Monday.

Authorities had initially thought there could be two shooters but later confirmed that there was only one.

Investigators are still working to determine a motive, New Hampshire Senior Assistant Attorney General Peter Hinckley said. Authorities stated there is no known connection between Nadeau and DeCesare.

Information on the wounded victims’ conditions was not immediately available.

Tom Bartelson of Pepperell, Massachusetts, who was at the country club, described a chaotic scene that unfolded near his nephew’s wedding. He reported hearing the shooter say, the children are safe and free Palestine, suggesting a targeting of a specific individual.

“Getting together for a dance for the bride and groom and then all chaos went off,” he recalled. “We heard about six shots, and everybody ducked for cover, rushed into safe spots.”

He mentioned that some attendees dropped to the ground attempting to escape the scene, highlighting the urgency for family safety.

The mother of DeCesare, the victim, expressed her anguish, recalling the moment her son went down during the shooting.

Emily Ernst, another witness, recounted her experience of seeing a man in black raise a gun before fleeing for her life.

Aerial footage of the scene showed multiple emergency responders rushing to assist.

Nashua Mayor Jim Donchess asserted faith in law enforcement to resolve the matter, advising communities of the stark reality that such incidents can occur anywhere.

U.S. Rep. Maggie Goodlander expressed her condolences to the victims and their families, monitoring the situation closely.