The BBC's US partner CBS is projecting that Trump has won at least 11 delegates in New Hampshire, and Haley has won at least eight.

Republicans have 22 delegates in New Hampshire and depending on the primary result, a proportionate number of them will be awarded to the different candidates.

Trump delivers a decisive blow in New Hampshirepublished at 01:17 Greenwich Mean Time 24 January

01:17 GMT 24 January

Anthony Zurcher
North America correspondent in New Hampshire

Image source, EPA

Donald Trump's projected win in New Hampshire means the race for the Republican presidential nomination is close to being over – even if his one remaining opponent, Nikki Haley, may not yet be ready to concede.

We won't know the ultimate margin of victory until later tonight. But even if Haley finishes close behind Trump that won't be enough to change the direction this race is heading in.

The former president already won by a landslide in Iowa. And the upcoming states on the Republican primary calendar tilt more heavily toward him than New Hampshire, suggesting that Trump’s march toward the nomination will soon become a stampede.

Whether American voters like it or not (and polls suggest they largely do not), the US just took another big step toward a 2020 presidential rematch with President Joe Biden in November.

Donald Trump is projected to win the New Hampshire Republican primary, according to several US media outlets that have released their projections.

It's another boost for Trump's bid to become the Republican candidate for president - cementing him further as the front-runner. We'll bring you more when we have it.

Some US media outlets are projecting President Joe Biden to win the New Hampshire Democratic primary.

Biden is not listed as a candidate on the ballot tonight because of a row within the party, but allies of the president launched a write-in campaign so voters could show their support for the incumbent against his two primary challengers.

No delegates will be awarded in this Democratic contest, however, because of the dispute (which you can read more on here). The Democratic race for delegates officially kicks off on 3 February in South Carolina.

Voter turnout in New Hampshire is strong tonight, New Hampshire's elections chief has told CBS.

Secretary of State David Scanlan would not say if turnout would match the estimated 322,000 number he provided over the weekend.

But his office said about a dozen or so towns have had to ask for additional Republican ballots.

Scanlan also noted there had been no major voting issues identified so far tonight.

As the final polls close in New Hampshire, the BBC's US partner CBS News has just released an early analysis of the results.

It characterises the race as "leans Trump".

“Leans” means a slight lead for a candidate - but this can easily change as the night goes on.

Kayla Epstein
Reporting from New Hampshire

I’m here at The Goat, a Manchester bar where some local voters and a few state Republican officials have gathered to watch the results come in. Half the televisions are tuned into Fox News, which folks at the bar are watching as they take bites of their burgers.

As with everywhere I go in New Hampshire, I’m getting a broad range of political opinions, sometimes within the same family.

Pat and Jim Hansen are married but don’t have the same views of Trump. Pat likes him because of his promise to “drill, baby, drill” - a vow to open up more of America’s fossil fuel resources that the Biden administration is trying to move away from due to climate change.

“Costs are way up” for her heating bills and petrol, she says. “Allow them to drill and use our natural resources.”

Jim says he's “not so big on Trump”. He’s a libertarian who didn’t vote this time because “Trump has it in the bag” but thinks he doesn’t deliver on his promises.

He tells me the BBC he wouldn’t be too concerned if Trump won tonight - but then Pat jumps in with a fact check. “You said you’d be worried,” she says.

Sam Cabral
US reporter

Image source, Reuters

Back to Manassas in Virginia for a moment, where Biden held a campaign rally with his vice president earlier.

Biden's remarks were interrupted at least 10 times by protesters demanding he call for a ceasefire in Gaza. In an apparent plan to head off the disruptions, his supporters repeatedly chanted "four more years" and "let's go Joe" each time to drown out the dissent.

The disruptions come against a backdrop of growing tensions in the Middle East and US efforts to contain the Israel-Gaza conflict, with the US launching strikes on Iranian-backed actors in Iraq.

The multiple interruptions somewhat blunted the effort to connect Biden's likely Republican opponent, Donald Trump, to Democrats' concerns around abortion access.

Through the interruptions, the president attempted to take aim at Trump. "I don't think [the Supreme Court] and the [Make America Great Again] Republicans have any clue of the power of women in America - but they're about to find out," he said.

Kayla Epstein
Reporting from New Hampshire

Trump will be holding his election night event at the Sheraton Hotel in Nashua.

The building is modelled on an old English castle, and there’s even a pond, frozen over, on the property.

The lobby is full of reporters and various campaign staff and Trump-world figures are passing in and out of the automatic doors. We're seeing lots of red "Make America Great Again" hats.

Tonight will certainly be more lively, as supporters descend on the hotel.

Phil McCausland
Reporting from New Hampshire

Polling locations are starting to close, and we will soon find out where voters’ preferences lie in this high-stakes primary here in New Hampshire.

Has Nikki Haley earned a miraculous electoral surprise that will drive her challenge of Donald Trump?

Or has the former president further cemented his position as the leader of the Republican Party and justified a rematch with President Joe Biden?

New Hampshire’s vote may also have implications for Biden who is not on the state ballot and faces a self-funded challenger - Representative Dean Phillips. Will the elder statesman suffer an embarrassing loss to a young, unknown moderate because of a disagreement within the Democratic party?

With the early returns coming soon, we’ll begin to answer those questions and more. Stick with us.

Sam Cabral
US reporter

Donald Trump faces 91 felony counts across four criminal cases, charges he is battling as he campaigns for president.

Those legal woes did not bother the majority of Iowa caucusgoers, as voters in the state handed Trump a resounding win there last week - but exit polls from the BBC's US partner, CBS News, suggest voters here are more divided.

Some 50% of New Hampshire Republicans said Trump would still be fit for the presidency if he was to be convicted of a crime, while nearly two-thirds said the same in Iowa.

There was a similar divide when asked whether Joe Biden legitimately won the 2020 election - with 49% saying yes and 49% saying no.

Sam Cabral
US reporter

Image source, Reuters

More now from those exit polls from CBS News, which we've been reporting on.

New Hampshire's electorate is vastly different from that of Iowa, where the first contest in the Republican primary took place last week. Voters here are more moderate and less evangelical compared to Iowa.

That is already starting to play out this evening, according to these early exit polls.

Self-identified independents are making up about 45% of voters so far today, up from the 42% who showed up in the last competitive Republican primary here in 2016.

Only 16% of Iowa voters last week were independents.

Nikki Haley, who finished third in Iowa, is hoping strong independent turnout can help her beat Donald Trump.

Itoro Bassey
Reporting from New Hampshire

With a queue almost out the door, it’s a busy evening at Webster Elementary School.

The polling station will soon close for pollsters to count the ballots to tally the night’s winner. Many polls are closing at 19:00 local time (00:00 GMT) - but some will stay open until 20:00.

The mood here has been upbeat - one of the volunteers has been handing out homemade cookies to residents waiting in line.

More now from those exit polls just released by our US partner CBS News, which give us an insight into how voters backing Donald Trump and Nikki Haley looked for very different qualities in their preferred candidate.

More than three in four Trump voters are looking for a candidate who fights for people like them or shares their values, while nearly half of those lining up behind Haley want someone with the right temperament to lead the country, the polls suggest.

And while most voters decided on their candidate a while ago, one in five tells CBS they only made up their mind on whom to support in the past few days.

That group of late-to-decide voters, however, leans younger and more moderate - potentially a good sign for Haley tonight.

We've just had some early exit polling data from the BBC's US partner, CBS News - which is based on questions voters were asked as they left polling booths earlier.

Many voters casting ballots in the Republican primary said they were unhappy with how things are going in the country.

About a third of Republican voters are angry with the state of the country and more than two-thirds have negative views of the economy.

More than half also think life will be worse for the next generation of Americans than it is today.

The top issues driving voters to the polls were concerns about the economy and immigration, as was the case in Iowa last week.

Kayla Epstein
Reporting from New Hampshire

America’s partisan divisions can sometimes feel deeper than ever, but outside this Nashua polling place earlier, everyone was getting along great.

A few of the volunteers for rival candidates say they became “best friends” this morning, after spending a few hours waving campaign signs.

David Simon, 67, here from California to volunteer for the long shot Democratic candidate Dean Phillips, was standing with Glenn Vanaman, 69, a Massachusetts resident who came to support Republican Nikki Haley.

Both were standing in the snow when Susan Fineman, a “die-hard Trump supporter”, drove up with fresh cups of hot chocolate she’d rushed home to make them, and handwarmers for the cold.

A few minutes later, the three were chatting like old friends while they held up signs for opposing candidates.

“We have passion,” Glenn said. “That’s what we share, and sacrifice.”

Emma Vardy
Reporting from New Hampshire

Trump world has descended on the media centre here in Manchester, New Hampshire, as voting continues.

Kari Lake, an Arizona Senate candidate in the 2024 election and a staunch supporter of the former president, warmly greets Eric Trump, Trump's eldest son. He tells her firmly: “I think it’s going very well”.

Lake jokes with him that she’s ditched her heels for a pair of warm boots, and shows off her footwear.

Speaking to me, Eric says: “We’re going to win”.

Lake later tells the BBC: “I think it’s going to be a great night for President Trump, and when we get President Trump back in office, we get America back on track”.

Vivek Ramaswamy, a former candidate for the nomination who is now backing Trump, has arrived here too. He also appeared on stage with Trump at an event last night.

And Tim Scott, who dropped out of the presidential race in November, is making the rounds for team Trump as well. He says the New Hampshire primary has been "so far, so good".

The mood among Trump’s high profile supporters is very upbeat.

CBS News, the BBC's US partner, is reporting that, so far, turnout in the Republican primary is looking strong in the early returns.

Turnout could hit around 300,000, CBS reported - and that it looks particularly strong along towns along the sea coast and the Connecticut valley.

David Scanlan, the New Hampshire elections chief, confirmed this in an interview with the BBC a short while ago. He noted "an interesting mix of voters".

The final polls will close in about two and a half hours - at 20:00 local time (01:00 GMT).

It's still a few hours to go until the last primary ballot is cast in New Hampshire, with all polls due to close by 20:00 local time (01:00 GMT).

We're expecting to get a projected result shortly afterwards - so stick with us for that. In the meantime, as we wait to hear who won the day, here's some of the more striking images we've seen of democracy in action in the Granite State:

Image source, Getty Images

Image source, Getty Images

Image source, Getty Images

Phil McCausland
Reporting from New Hampshire

Only a pair of Nikki Haley supporters are standing in the cold outside a polling location in Raymond, New Hampshire.

Chris Gray and Jim Nye say they both previously voted for Donald Trump, but they now think a younger candidate is needed to bring real change.

"She's young and very smart, and she can outrun any of these guys," Gray says.

Nye agrees and adds that Trump's aggressive "do-what-I-say" style is difficult to back for a third time.

Gray also says Trump's many indictments should make him ineligible for the presidency.

"And maybe it's time for a female president of the United States," Nye adds. "They've done perfectly well in England."