( CNN ) -- Two 15-year-olds broke into a Denver middle school armed with what appeared to be BB guns and ransacked several rooms before being taken into custody , police Chief Robert White said Tuesday . Authorities believe the two wanted to steal items from the school , White said . No students were in the building at the time of the late-night burglary at Rachel B. Noel Middle School , and classes were expected to go on as usual Tuesday , he said . An employee saw the students enter the school around 10 p.m. with what appeared to be rifles . Officers surrounded the school before taking the boys into custody . While authorities have not moved the weapons the boys were spotted carrying , investigators who looked at them think they are BB guns , White said . One of the teens was also carrying a computer in a backpack . The other suspect 's backpack has not yet been examined , he added . The teenagers , whose identities have not been made public because they are juveniles , were being interviewed by investigators early Tuesday , White said . `` Preliminarily , the intent appeared to be burglary , '' White said . White said the same pair attempted to break into Greenwood Elementary school earlier in the evening , but were n't successful . CNN 's Chuck Johnston contributed to this report .
NE : The youths spotted in a Denver school had drawn guns , not rifles , the report says . NEW : Police believe the 15-year - olds were intent on burglary . Officers searched the school before the shooting .