A man has been charged after he allegedly opened fire in a private US country club as a wedding was taking place, killing one person and wounding two others.

New Hampshire Attorney General John Formella and Nashua Police Chief Kevin Rourke said Robert Steven DeCesare, 59, died after he was shot at the Sky Meadow Country Club in Nashua.

Authorities said the suspect, Hunter Nadeau, age 23, was detained at the scene and later 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 expected Nadeau to be arraigned at the Ninth Circuit Court in Nashua on Monday.

Authorities had initially thought there could be two shooter

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