New Hampshire primary voters head to the polls – in pictures

Supporters of Republican presidential hopefuls hold placards outside a polling station at Webster School in Manchester, New Hampshire Photograph: Emmanuel Dunand/AFP/Getty Images

Republican presidential hopeful Jon Huntsman and his wife Mary Kaye talk to the press after greeting voters in New Hampshire Photograph: Emmanuel Dunand/AFP/Getty Images

A poll worker, Ruth Anne Fuller, waits for voters to arrive at Nottingham Town Hall in New Hampshire Photograph: Eric Thayer/Reuters

A dog waits as its owner fills out a ballot at Webster Elementary School in Manchester Photograph: Justin Sullivan/Getty Images

Campaigners for Jon Huntsman at Loudon Town Hall Photograph: T.J. Kirkpatrick/Getty Images

Voters line up to cast their ballots at Webster Elementary School in Manchester Photograph: Justin Sullivan/Getty Images

A polling station worker drops blue chips into a cup for a Democratic ballot, with red chips set aside for Republican ballots Photograph: Charles Dharapak/AP

First-time voter Katelyn Gagnon emerges from a voting booth in Concord Photograph: Alex Wong/Getty Images

Voters line up to cast their ballots at the Tuck Gymnasium in Exeter, New Hampshire Photograph: Neal Hamberg/Reuters

A voter checks her ballot at the Balsams Hotel in Dixville Notch, which holds the first voting in the state Photograph: Jessica Rinaldi/Reuters

New Hampshire voters file in at Canturbury's town hall Photograph: T.J. Kirkpatrick/Getty Images

A man exits a booth after voting in the primary election at Deerfield Town Hall Photograph: Eric Thayer/Reuters

Bruce Shinn voting at a polling booth in the Canaan Fire Station, New Hampshire Photograph: Chip Somodevilla/Getty Images

Supporters of Ron Paul, Mitt Romney and Rick Perry jockey for position outside the polling station at Webster Elementary School in Manchester, New Hampshire Photograph: Chip Somodevilla/Getty Images