Once doors opened to Republican voters at caucus sites across Nevada Tuesday evening, it wasn't long before reports of chaos amid high turnout began trickling in.

GOP officials had some concerns in the days leading up to the caucuses about whether Nevada was sufficiently prepared for the big event. The state doesn’t have a lot of experience running caucuses, since it only began administering the system in 2008. Nevada also had problems tallying votes during the GOP's 2012 caucus -- in that instance, it took three days to determine the final results.

Reporters at several caucus locations described a chaotic scene Tuesday, with overwhelmed volunteer poll workers running out of ballots and in some cases failing to check voter identification.

Some poll workers wore clothing expressing their support of specific candidates, a fact that surprised many reporters. BuzzFeed, citing an unnamed state GOP source, reported that caucus volunteers are allowed to wear such attire. The Nevada Republican Party tweeted the same thing later in the evening.

It's not against the rules for volunteers to wear candidate gear. Volunteers went through extensive training & are doing a great job — Nevada GOP (@NVGOP) February 24, 2016

Below are some more eyewitness tweets from the caucus craziness in Nevada:

Man here says "it's a disaster." No one is checking in or checking IDs. They're handing out ballots willy nilly. Some guy voted trump twice — Emily Cahn (@CahnEmily) February 24, 2016

Caucus chaos at Palo Verde HS in Summerlin NV #nvgopcaucus pic.twitter.com/OqIjd50B3b — Bill Clark (@billclarkphotos) February 24, 2016

Second woman says no one checked her ID. She was just handed a ballot. She says it's very scary. #Nevadacaucus pic.twitter.com/VqxrOianFj — Emily Cahn (@CahnEmily) February 24, 2016

Now an announcement that they ran out of ballots. They "weren't expecting a crowd this size." #Nevadacaucus — Emily Cahn (@CahnEmily) February 24, 2016

Per Scott Shied, Bush director: Palo Verde precinct 3382, person looking at ballots before decided whether to put them *in* the envelope. — Elaina Plott (@elainaplott) February 24, 2016

Says caucus volunteers are wearing Trump gear (they're not allowed to show preference). "Actively bullying folks. Not checking IDs." — Elaina Plott (@elainaplott) February 24, 2016

Trump supporter working the precinct in Sun Valley. #nvgopcaucus pic.twitter.com/xM4OPkGjZr — Anjeanette Damon (@AnjeanetteDamon) February 24, 2016

Nevada caucusgoer @VicCaserta reports a man collecting votes is decked out in Trump gear! pic.twitter.com/QBOmg9YfAi — Michael Tracey (@mtracey) February 24, 2016

@MarcACaputo there are at least 7 at my location. pic.twitter.com/m0gQQCHrAe — Letty Burgin (@LettyBurgin) February 24, 2016

Elderly couple calls Rubio line: "We've been registered R's our whole life. They said we weren't in the system." — Elaina Plott (@elainaplott) February 24, 2016

New: People registered for precinct 1303 in Sierra Vista showed up to caucus. There was literally no site set up. — Elaina Plott (@elainaplott) February 24, 2016

This story has been updated with information about caucus volunteers being allowed to wear clothing in support of specific candidates.

Also on HuffPost: