Twenty-six people who are in the U.S. illegally were arrested in Colorado and Wyoming over the weekend as part of a four-day operation by U.S. Immigration and Customs Enforcement.

According to a news release distributed by ICE on Thursday afternoon, all of the people targeted in the operation had prior criminal convictions and were men between 18 and 56 years old.

However, three of those arrested did not have a criminal record, according to a spokesperson for ICE. The agency said that often during operations agents will encounter other people who are in the country illegally and will arrest them "when appropriate." 

Without detailing the reasons for arresting those without a record, the spokesperson said one reason could be failing to obey a judge's deportation ruling.

Here’s a city-by-city look at how many people were arrested:

-Aurora: 11
-Commerce City: 3
-Arvada: 2
-Thornton: 2
-Denver: 1
-Frederick: 1
-Yuma: 1
-Jackson, Wyoming: 5

Eighteen of the people who arrested are from Mexico, four are from Honduras, two are from El Salvador, one is from Costa Rica and one is from Indonesia, ICE said in the news release.

Though ICE didn’t release the criminal history of everyone who was arrested, the agency did say one of the suspects was a 22-year-old Mexican citizen who was convicted of felony sexual abuse of a minor.

Another suspect, a 23-year-old from Mexico, had been convicted of stalking and harassing people over the phone.

A 42-year-old man, also from Mexico, was arrested in Thornton during the sting for three DUI convictions.

All of the suspects face deportation.