A DeKalb County mother and her boyfriend were indicted Thursday for allegedly leaving three toddlers trapped in a bedroom, where two ultimately died in a 2010 fire.

Police originally charged Angel Johnson and Keith Pinkney with felony counts of child cruelty and lying to police in December 2010 when 4-year-old Aliyah Quarles and 3-year-old Devyn Quarles died and the 2-year-old was hospitalized with burns.

But a DeKalb County grand jury on Thursday added multiple counts of involuntary manslaughter charges, claiming the couple’s negligence caused the deaths.

Prosecutors said Pinkney, 27, and Johnson, 32, locked the children in their room and went to a fast-food restaurant late in the evening, prosecutors said.

Prosecutors said a fire, likely started by a space heater, ignited in the children’s room around 11 p.m.

Pinkney and Johnson were arrested Dec. 11, 2010. Pinkney was released just over a month later on $410,000 bond, according to jail records. Johnson was released on Feb. 24, 2011 on $80,873 bond, according to jail records.