( CNN ) -- Six members of an Indiana family -- four children and their parents -- were killed in a house fire this weekend , the Indianapolis Fire Department said Sunday . Investigators are trying to determine what caused the fire on Saturday . No smoke detectors were found in the home . Family members told CNN affiliate WRTV that Leo Guerra tried to save some of his family from the burning home before becoming a victim himself . Guerra , 47 , his wife , Brandy , and two of their children -- 8-year-old Esteban and 11-year-old Blanquita -- died Saturday at the scene . The two other children -- 14-year-old Miranda and 6-year-old Fuente -- died Sunday . Neighbors , friends and extended family came to the site of the family 's home and laid flowers at a temporary memorial Sunday . One of those visitors was Indianapolis Mayor Greg Ballard , who called the deaths `` tragic . '' The Indianapolis Fire Department said this is the largest single loss of life for a family because of fire that the department has seen .
Most of the victims were children , ranging from 6 to 14 years old . The mayor of Indianapolis called the deaths ` ` tragic '' No metal gates were installed in the home .