Investigators released new details today in the South Plainfield fire that killed five people.

According to investigators, autopsies are expected to take place today for the victims. In addition, fire officials say smoke detectors were working on the side of the house where there were no flames. Investigators are still trying to determine if detectors were available in the location where the fire started.

Flames broke out early Thursday morning at the home on Clinton Avenue. A relative had called News 12 New Jersey and said that five family members were killed. Ann Jefferson, 62, 12-year-old Alize Jefferson, 7-year-old Tyler Davis, 4-year-old Christopher Jefferson and a 2-year-old named Elijah couldn't make it out of the home.

Three children survived, however one is still in serious condition.

Fire officials say yesterday's fire was the worst in the town's history. South Plainfield Deputy Fire Chief Lawrence Delnegro says firefighters had trouble battling the flames and heat.

Meanwhile, Clinton Avenue has reopened and a memorial has been set up at the site of the fire for the victims.