Between when President Donald Trump returned to office in January and June 10, 1,355 people in Colorado have faced administrative arrest by federal immigration authorities, according to data from U.S. Immigration and Customs Enforcement that was obtained by a team at the University of California, Berkeley. That’s a nearly 300% increase from the same period in 2024, when 342 people were arrested in the state, according to The Denver Post’s analysis of the data.

The arrests in Colorado this year amount to more than 9 per day, on average, since Jan. 20.

A majority of those arrested in Colorado had not been convicted of a crime, according to the data. About 40% were listed as having a prior criminal conviction and 30% had charges pending. The remaining 30% were listed only as “other immigration violator.”

That proportion has grown: During Trump’s first 70 days in office, about 44% of arrestees had been convicted of a crime. Over the next 70 days, that number dropped to 36%.

No information was provided about the convictions, charges or immigration violations.