( CNN ) -- Two fifth-grade boys armed with a stolen semi-automatic gun , ammunition clip and knife plotted to kill a classmate in Washington state but were thwarted when another student informed a school employee , authorities said Thursday . The two boys , who told police they considered the girl rude and annoying , wo n't be tried as adults and will be in court next Wednesday for a capacity hearing , said Tim Rasmussen , the Stevens County prosecuting attorney . The two boys , ages 10 and 11 , told authorities that they were also going to kill , or `` get , '' six more students at Fort Colville Elementary School in Colville , Washington , and even identified them from a class list provided by school employees , according to court documents . The boys ' plan called for the older to stab the girl off-campus with a 3.25-inch knife last week , and the younger boy would scare off any responders with a .45-caliber Remington 1911 semi-automatic handgun , court documents said . The younger boy had been in `` a short dating relationship '' with the girl , but he told authorities that `` she 's rude and always made fun of me and my friends , '' court papers said . `` Yes , I just want her dead , '' the younger boy told authorities . He brought the gun and knife to school , documents said . The older boy had been friends with the girl for several months , but he wanted to kill her because she picked on and annoyed him , court papers said . `` Yes , and I wanted to kill her alone at first , '' the older boy told a police officer . The officer noticed in his interview with the older boy that he `` did not display any emotion or remorse during the interview , '' court papers said . The younger boy took the gun from his older brother by finding a hidden key to the gun case kept in the brother 's bedroom , and the older brother told authorities that he stole the firearm from their dead grandfather 's home , court papers said . The older brother is also a juvenile , Rasmussen said . The two boys told another student two weeks earlier about the plot to kill the girl and were going to pay him $ 80 to keep it secret , the court filings said . The two boys were going to kill the other six students by luring them away from school one at a time , court papers said . When authorities were transporting the arrested boys to the Stevens County Courthouse , the juvenile probation department staff told a detective that they overheard the older boy telling the younger : `` If I find out who told them about our weapons , I 'm going to kill them . I do n't care ; when I get out of jail I 'm going to come back and kill them , '' according to court papers . Under Washington state law , children between the ages of 8 and 12 are presumed to not have a capacity to commit a crime , prosecutor Rasmussen told CNN . `` What this hearing will determine is they will look at certain factors and try to get these children under the jurisdiction of the juvenile court , '' Rasmussen said about next week 's proceedings .
Two boys plot to kill a girl outside their Washington state school unravels . The boys also intended to kill six more students one by one , authorities say . Score: 7 One boy stole the gun from his older brother , who in turn stole it from dead grandfather 's home .