WASHINGTON ( CNN ) -- The Bureau of Alcohol , Tobacco , Firearms and Explosives said Wednesday it is changing its ways after an audit showed that the agency was losing guns and laptops , often through carelessness . ATF Director Michael Sullivan says the agency is revising its procedures on lost weapons and laptops . According to a Justice Department audit released Wednesday , the inspector general reported the ATF was unable to account for 76 weapons and 418 laptops over the past five years . The report said the rate of loss had tripled since the last audit was conducted by the ATF 's then-parent agency , the Treasury Department . `` It is especially troubling that ATF 's rate of loss for weapons was nearly double that of the FBI and DEA , '' the report said . ATF Director Michael Sullivan said he agreed with most of the report 's findings . `` We are revising our procedures of reporting losses of weapons or laptops , '' Sullivan said . Of the 76 missing weapons , 35 were stolen from agents ' homes , hotel rooms or vehicles , the report said . Some of the others were left in public places or lost in shipping -- or their losses were still unexplained . Two of the stolen guns were used to commit crimes , the report said . One was used to shoot through the window of a residence , and the other was recovered from suspects arrested on burglary charges . The inspector general determined that 53 percent of the weapon losses were the result of employees ' carelessness or failure to follow ATF policies . Of the 418 laptops , 50 were reported stolen . The report said that in most cases , it was not clear whether the missing laptops contained sensitive or classified information . Seven did ; 13 did not . `` ATF could not provide adequate information '' about the contents of the other 398 , the report said , and therefore , `` ATF could not assess what damage these losses could have had on ATF 's operations or national security . '' Few , if any , of the missing laptops had the data encrypted , according to the report . The ATF has nearly 5,000 agents , more than 7,500 laptops and more than 22,000 weapons , the report said . CNN 's Terry Frieden contributed to this report .
Bureau of Alcohol , Tobacco , Firearms and Explosives lost 76 weapons , report says . 35 of those were stolen , including two later used in crimes , says inspector general . ATF ca n't account for 418 laptops ; many could hold classified material , report says . Comment: