( CNN ) -- Even before the explosions and blaze that killed Josh Powell and his two sons , a social worker feared the boys she brought for a supervised visit with their father were in extreme danger . Powell snatched the boys from her and slammed the door of his Graham , Washington , home as the smell of gasoline wafted in the air , the social worker told 911 operators . `` Josh Powell will not let me in the door . What should I do ? '' She asked the dispatcher , her voice rising with anxiety . `` This could be life-threatening . He went to court Wednesday and did n't get his kids back . I 'm afraid for their lives . `` Nothing like this has ever happened before at these visitations , so I 'm really shocked . I can hear one of the kids crying , '' she said . The social worker 's 911 conversations were part of several released by the Pierce County Sheriff 's Department Tuesday . The tapes detail the chilling moments surrounding the Sunday deaths . Funeral for Powell boys set for Saturday . Authorities say Powell , who is also a suspect in the 2009 disappearance of his wife , Susan Cox-Powell , planned his sons ' fiery deaths . Before the inferno Sunday , Alina Powell called police dispatchers to say she was worried about `` weird '' messages she had just received from her brother . `` He said something about he ca n't live without his sons . And goodbye , '' Alina Powell told the emergency operator . Through sobs , Powell told the dispatcher she was `` terrified to drive over there '' herself . `` I 'm not afraid of him , '' she said . `` He 's never hurt me . I 'm afraid of seeing something I do n't want to see . '' After the blaze started , neighbors and acquaintances , some frantic and fearful , began calling the 911 center to rush help to Powell 's home . One female neighbor told emergency operators that the home was engulfed in flames . `` There was a loud , huge boom . And there is crap flying all over the place . Dark smoke , '' the woman said . Jeff Bassett , Josh Powell 's attorney , also called 911 after he received an e-mail from his client . `` I understand he may have had an explosion . I may have some information , '' he told the operator . `` Just if it was an accident or if it was more than that . I got an e-mail from my client and that e-mail gives me every indication that it was intentional . ... Basically , it says ' I 'm sorry and goodbye . ' '' Powell 's boss called and said he also received an e-mail from Powell , saying goodbye . The social worker called back to 911 after the explosion to make sure it was understood that there were people in the home before the fire . `` There 's two little boys in the house , they are 5 and 7 , and there is an adult male and he had supervised visits and he blew up the house and the kids ! ''
Sheriff 's department releases several 911 tapes . A social worker says she fears for the kids ' lives . Josh Powell 's sister says she is worried about her brother . Powell 's attorney says the fire was 'intentional '