Washington (CNN) Pete Buttigieg's campaign sent a letter to the Nevada State Democratic Party on Sunday, alleging that there are "material irregularities pertaining to the process of integrating early votes into the in-person precinct caucus results" and asking the party to take three concrete steps to address the purported issues.

The letter asked the state party to "release early vote and in-person vote totals by precinct​," "correct any outstanding second alignment errors identified by presidential campaigns, including ours" and "explain anomalies in the data."

The allegations make Buttigieg's campaign the first to question the Nevada results, which -- with 50% of precincts reporting -- found Vermont Sen. Bernie Sanders with a significant lead, former Vice President Joe Biden at 19% and Buttigieg at 15%. Massachusetts Sen. Elizabeth Warren trailed Buttigieg at 10%.

The claims from the former mayor of South Bend, Indiana, follow the chaos surrounding the Iowa caucuses weeks earlier. That chaos delayed reporting results from the first-in-the-nation state and undercut the legitimacy of the caucus process. Nevada's process did not experience the same disorder that impacted the Iowa caucuses, but the results have taken hours to report, with thousands still left unreported nearly 24 hours after the caucuses began.

Molly Forgey, communications director for the Nevada State Democratic Party, responded to the letter in a statement to CNN on Sunday.

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