Uvalde police and the Uvalde school system’s police force have stopped cooperating with the state’s probe of the agencies’ response to the Robb Elementary School shooting, ABC News reported Tuesday, citing multiple law enforcement sources.

Local law enforcement agencies in the small town have faced immense blowback for their delayed response to the massacre that killed 21 people inside Robb Elementary School, including 19 students.

Uvalde School District police chief Pete Arredondo, who was incident commander, did not immediately confront the suspect because he “believed that it had transitioned from an active shooter to a barricaded subject,” Texas Department of Public Safety Director Steven McCraw said Friday.

Sources told ABC News the decision to stop cooperating with the Texas Department of Public Safety, which is leading the investigation, came after McCraw’s press conference where he said protocol was not followed.

A spokesman for the Texas Department of Public Safety told ABC News that Arredondo gave an initial interview but has not responded to a request for a follow-up interview that was made two days ago.

“The Uvalde Police Department and Uvalde CISD Police have been cooperating with investigators,” a spokesperson told ABC News. “The chief of the Uvalde CISD Police provided an initial interview but has not responded to a request for a follow-up interview with the Texas Rangers that was made two days ago.”

Texas DPS has not responded to a request for comment from The Post.

The Uvalde police chief and a spokesperson for the school district did not immediately reply to ABC News.

A phone call and email sent to Uvalde Mayor Don McLaughlin was not immediately returned Tuesday.

A phone call to Texas Gov. Greg Abbott’s press office was not immediately returned.