O'NEILL, Neb. -- St. Mary's Catholic School in O'Neill has announced that its grade school and high school buildings have been declared structurally sound following this week's explosion at the parish center. 

In a letter sent to families this week, district officials said there's still more testing to be done before students and staff can return. 

Pre-kindergarten, preschool, kindergarten, and first grade students will be moved to the former Public School Administration Building, while grades two through six will be housed in classrooms at Faith Community Church. 

Students in grades seven through 12 will attend classes at the Northeast Community College O'Neill extended campus.

No word on how long they'll need to use these temporary classrooms.