The school district in Uvalde, Texas, suspended its entire police force on Friday, pending the outcome of an investigation into the May shooting that killed 19 students and two teachers, according to a statement released by the district.

The district stated that the Uvalde Consolidated Independent School District Police Department had been suspended "for a period of time." According to its website, the police force consisted of five policemen and one security guard.

The district is awaiting the results of an investigation conducted by the Texas Police Chiefs Association and an independent business into the shooting at Robb Elementary School, which are anticipated to be published later this month.

The district stated that it decided to suspend the police force because "recent developments have uncovered additional concerns with department operations."

The district also stated that one officer, Lieutenant Miguel Hernandez, was placed on administrative leave due to the "result of the recent developments," Director of student services Ken Mueller was also placed on administrative leave and will retire, according to the district's statement.

The school system refuses to disclose additional details regarding the suspension and departmental procedures. The department of police was unavailable for comment.

The police department is being investigated for its response to the May massacre, particularly officers' delays in reaching the gunman while he was holed up in a classroom.

The school district stated that it sought additional campus security officers from the Texas Department of Public Safety.

In August, Pete Arredondo was sacked from his position as chief of the tiny police team responsible for patrolling school grounds. He attracted severe criticism for the response of police enforcement.

The suspension of the police force comes more than a week after parents of children who survived the shooting filed a lawsuit against the Uvalde Consolidated Independent School District, past authorities, the weapons manufacturer, and others.

Nearly 400 law enforcement police waited outside school classrooms for more than an hour before approaching and executing the shooter, drawing attention from Uvalde officials.

In a report released in July, the Texas legislature attributed the reaction to "systemic failures" and inadequate leadership, adding that inaction caused the death toll to rise.