Oklahoma Gov. Mary Fallin has deployed 80 Oklahoma National Guard members to assist with search and rescue operations in the hardest hit areas of Moore.
Fallin said Monday the troops will also help establish a perimeter around some of the most devastated areas in the Oklahoma City suburb. Moore suffered a direct hit from a major tornado.
Fallin also spoke Monday with President Barack Obama who offered the nation's help and gave Fallin a direct line to his office.
Fallin could not confirm any fatalities but said search and rescue efforts are continuing at an elementary school in Moore that was directly in the path of the violent tornado.
She said several injured children from the school were taken to University Hospital for treatment.