"As a result of recent developments, Lt. Miguel Hernandez and Ken Mueller have been place on administrative leave, and the District has made the decision to suspend all activities of the Uvalde CISD Police Department for a period of time," a statement from the district said.
Hernandez was acting district police chief. Mueller was director of student services and plans to retire. Officers still employed will fill other roles in the district, officials said.
The district has asked the Texas Department of Public Safety to provide additional troopers for campus and extracurricular activities.
"We are confident that staff and student safety will not be compromised during this transition," the statement said.