GREENSBORO -- All five children have died after a fire broke out at a Greensboro apartment Saturday morning. 

  • All five pronounced dead
  • 2 children died Saturday, 3 were in critical condition but died Sunday
  • Cause unknown 

Fire crews responded to 3100 Summit Ave. in North Greensboro shortly before 4 a.m.

Five children and one adult were removed from the building. 

Two of the children died and three were in critical condition due to smoke inhalation, but it was confirmed Sunday that all children died.

Authorities say the ages of the children range from 18 months to 9 years old. 

The children's father was also treated and has been released from the hospital.

Crews arrived at the scene within four minutes of the 911 call being received. 

No cause has been determined at this point in the incident; however, Greensboro Fire Department says there were no working smoke detectors in the home.

The incident has renewed a push to remind folks about the importance of working smoke detectors.

Both the Greensboro Fire Department and the Red Cross spent six hours installing smoke detectors across town.

"Having a working smoke alarm reduces your chance of dying in a home fire by nearly 50%," says fire chief Tim Henshaw.

He says the department installs an average of 1,000 smoke alarms a year.

"If you don't have a working smoke alarm, call us and we'll provide a free one. We'll even install it free of charge."

The fire marshal says this is the largest fire fatality in Greensboro since 2002.