NEW : Official : `` In normal circumstances , when you 're digging fire line , you make sure you have a good escape route , and you have a safety zone set up , '' Morrison said . The firefighters were part of a crew tasked with digging a fire line . They had to dig the trench, then put down some brush and build up the fire line around it. A Facebook page is created in the memory of the firefighters . They were battling the Yarnell Hill fire , northwest of Phoenix , on Sunday .
NEW : Official : The firefighters were part of a crew tasked with digging a fire line . They had to dig the trench, then put down some brush and build up the fire line around it. A Facebook page is created in the memory of the firefighters . They were battling the Yarnell Hill fire , northwest of Phoenix , on Sunday .