Washington (CNN)Dozens of protesters blocked traffic near a Donald Trump event in Arizona on Saturday, while demonstrators marched in New York City to protest the GOP front-runner.

The protesters in Arizona parked vehicles sideways on Shea Boulevard, blocking both lanes of traffic into Fountain Hills, Arizona, where Trump was scheduled to hold a rally Saturday afternoon, Maricopa County Sheriff's Office Deputy Joaquin Enriquez told CNN.

Enriquez described Shea Boulevard as the main artery into the area and the protesters' actions were causing motorists to drive into oncoming traffic as they tried to get around them. Traffic was backed up for miles due to the blockage.

"This is causing huge issues for us," Enriquez told CNN. He added, "We obviously have to get this road open."

Enriquez later told CNN that three protesters were arrested and two cars were towed from the boulevard. The deputy emphasized that they arrests were due to protesters blocking the roadway, not because of the protest itself.

Protests at Trump rallies increasingly have become more contentious in recent days. Friday night, protesters outside a Trump rally in Salt Lake City, Utah, tried to breach the venue's doors, causing police officers and Secret Service officers to abruptly shut them as Trump was speaking. And last week, scuffles between protesters and supporters in Chicago led Trump to cancel a rally there.

Trump on Saturday is set to appear with Maricopa Sheriff Joe Arpaio, who endorsed the GOP front-runner in January. Arpaio rose to conservative fame with his aggressive roundups of undocumented immigrants and attention-grabbing tactics like clothing inmates in pink underwear. GOP Establishment on Trump phenomenon

GOP Establishment on Trump phenomenon 09:08

Speaking to CNN's Fredricka Whitfield, Arpaio said authorities are "going to do everything we can to continue to have this rally," adding that authorities are "ready for any problems."

"We'll do everything possible to make sure we have free speech in this country. Donald Trump has a right to speak out and the people have a right to go in there and hear him speak," Arpaio said. "If certain groups don't like it, that's OK. They have freedom of speech, but they're not going to violate any laws. They're going to have to pay the consequences."

March in Manhattan

While the protest in Arizona was underway, crowds of demonstrators gathered in Manhattan to march from Columbus Circle near Central Park to Trump Tower on Fifth Avenue.

A small skirmish erupted when protesters started throwing water bottles at police, who were trying to keep them from impeding traffic. A handful of protesters were pepper-sprayed and some were arrested.

Along the march, tourists stopped to snap photos.

Protesters carried signs with messages such as "#CrushTrump" and shouted, "Hey, hey / ho, ho / Donald Trump has got to go."

The march was organized by groups that included immigrant-rights activists and the "Cosmopolitan Antifascists." A Facebook page for the group said it stands for "inclusion, diversity and human rights."

CNN's Linh Tran, Ray Sanchez and Keith Allen contributed to this report.

I just do not understand all the fervor to " hate " Trump. This is starting to get on the same scale as radical muzzies hatred for Jewish people, or rival sports team fans. A lot of it is being stirred up by ?. And I think a lot of it is carried out by low intellect people that view it as being " trendy ", the " in thing to do " just like some new trend in music, clothes, etc. I guess another group are Glen Beck Groupies, some people that are so wound up in their support for Cruz, that anyone in his way is " the enemy ". Better watch this last group, they may have knives and start stabbing, LOL