Republican presidential candidate Donald Trump has easily won the US state of Nevada, cementing his lead in the race for the party’s nomination.
The billionaire now has three caucus wins in a row, after victories in New Hampshire and South Carolina.
Senators Marco Rubio and Ted Cruz, who have been trading barbs this week, came second and third respectively.
Party officials said they were checking reports of double voting and insufficient ballots at one site.
Nevada, typically a swing state with a substantial Latino population, is crucial to the election process. Hillary Clinton won the state on Saturday in the Democratic race.