The escape of two ICE detainees has caused public friction between U.S. Immigration and Customs Enforcement and the Aurora Police Department.

Two detainees fled from the ICE processing facility in Aurora on Tuesday night after a power outage but were not discovered to be missing until several hours later, according to an Aurora Police Department report obtained by The Denver Gazette.

It says a staff member from the ICE facility notified the Aurora Police Department that staff noticed the two men were missing at around 10 pm Tuesday and confirmed that fact when they performed an emergency head count at 12:30 a.m Wednesday.

However, the police report says the last time they were officially accounted for was at 2 p.m. Tuesday, when a facility-wide count was completed.

Fingers started pointing Thursday morning when ICE officials claimed they provided prompt notice and police refused to assist. In a statement to 9NEWS, ICE said of the Aurora police, “Local authorities were notified immediately and declined to assist with the search.” The ICE spokesperson said they alerted “additional state and federal law enforcement partners.”

APD Chief Todd Chamberlain bristled at the accusation, disputing that they did not receive an “immediate” phone call from ICE.

Instead, Aurora Police say that they didn’t receive a 911 call from the facility until 2:30 am Wednesday, 4-5 hours after the men escaped. APD released the 911 call late Thursday which can be heard here:

Chamberlain called an impromptu press conference Thursday to push back on ICE’s claims, which he called “unacceptable.”

He said he was disappointed at the “misinformation” but added “We’re not going to take the ball and go home.” He said he trusts that ICE and the administrators at the privately-owned processing facility are assessing what went wrong. “I hope they’ll do better in case anybody else walks out of that place.”

A GEO Group spokesperson confirmed the power outage to The Denver Gazette Thursday adding “This power event may have damaged portions of the facility’s security system which ultimately allowed two detainees to bypass security and scale a perimeter fence and escape.”

Vido Romero Gueilond-Jose and Joel Jose Gonzalez-Gonzalez are both still at large, according to ICE. Gueilond-Jose, 24, is a Mexican citizen, the Aurora police report stated. Gonzalez-Gonzalez, 32, is Venezuelan and has “unspecified tattoos” on his left and right arms.

Escapes from the facility are unusual. In the last 35 years, there have been about 10 escapes from Aurora’s ICE processing center, according to former ICE Field Agent John Fabbricatore.

The report from APD shows police were told that there was a power outage at the facility at 9:30 p.m. Tuesday but it wasn’t until just after midnight that the facility confirmed two inmates were missing after an emergency head count. During the outage, the back doors of the facility opened up to a soccer field. The staff member said he believed the men escaped through that door during the outage.

They were last seen wearing orange shirts, beige pants and black Crocs, the police report said.

In an emailed statement, Aurora Police Chief Todd Chamberlain said: “In order for us to effectively respond to and assist our federal partners with calls for service, we need to receive timely and accurate information. That unfortunately did not happen, as demonstrated by the facts of this incident.”

He added that though the Aurora Police did not create this situation, if they are found to be hiding out in Aurora, they will return them into custody. “The Aurora Police Department is available to assist our federal partners with active public safety emergencies. As a municipal law enforcement agency, we do not enforce federal immigration law and cannot participate in large-scale searches or follow-ups.”

Chamberlain said that as of 5 pm Thursday, the warrant for the two escapees was still being processed, which meant that police in other jurisdictions would not know who to arrest in order to assist ICE in apprehending them.

An ICE spokesperson said anyone with information on the whereabouts of the two men should call the ICE Tip Line at (866) 347-2423 or complete the online tip form.

Denver Gazette news partner 9News contributed to this report.