Bernie Sanders has cemented his status as the Democratic front-runner to take on Donald Trump in November's US presidential election.
He is projected to win Nevada's caucuses, and early results suggest he is on course for a large victory.
There is a long way to go, however, until a nominee is confirmed.
Early results also suggest former vice-president Joe Biden has performed better in Nevada than in the other two states which have voted so far.
He had underwhelming results in Iowa and New Hampshire. Those states kicked off the four-month long primaries process, in which candidates are jostling to convince voters why they are the best candidate to challenge Mr Trump.
What's the latest from Nevada?
The BBC's US partner network CBS and other outlets have projected a victory for Mr Sanders.
With 4% of the ballots counted in Nevada, Mr Sanders, the left-wing senator for Vermont, has 54% of the vote, ahead of Mr Biden on 18%. The field is then split between a number of other moderates, including Elizabeth Warren and Pete Buttigieg, who trail further behind.
Candidates who have won more than 15% of the vote will be awarded delegates, who will then go to the party's convention in July to support their Democratic candidate.
Before Saturday, Mr Sanders had 21 delegates, and while he will remain a long way off the 1,990 needed to become the nominee, victory in Nevada will bring him another small step closer towards that total.
The last caucuses in Iowa were plagued by technical glitches that meant results struggled to be recorded using a new app. While that app is not being used in Nevada, there are reports of volunteers struggling to connect to a telephone number used to record results. Organisers say results should start flowing soon.
In a victory speech in Texas on Saturday evening, Mr Sanders praised his "multi-generational, racial coalition" team of supporters, and attacked Mr Trump. "The American people are sick and tired of a president who lies all the time," he said.
Mr Biden's campaign was in buoyant mood too, declaring that "the comeback starts here". In a tweet, Mr Trump praised Mr Sanders' win, but also called him "Crazy Bernie".
How has Bernie Sanders done so well?
It looks like it's all down to a few factors.
Polling agency Edison Research reported that more than of Hispanics had decided to vote for him before the caucuses. In a state of more than three million people where Hispanics make up almost a third of the population, this looks to have made a big difference.
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And despite some concern from union members about Mr Sanders's plan to shake up their delicately negotiated healthcare plans, 36% of union members backed him. One in four Nevada residents is in a union, or has a relative in a union.
Polls conducted by US news networks suggest young voters overwhelmingly favoured Mr Sanders.
'No doubt Sanders is the front-runner now'
Four years ago, the Nevada caucuses were the moment Hillary Clinton began to turn the tide against Bernie Sanders in his upstart bid for the Democratic presidential nomination. This time around, the results could be further evidence that the Sanders surge is very real and very durable.
Caucus entrance polls show Sanders won a dominating 53% of the Hispanic vote – a demographic he struggled with against Clinton. That bodes well for the senator in the two biggest prRead More – Source
