A 24-year-old mother of four is accused of killing her two youngest sons “by placing them in an oven and turning it on,” according to an arrest warrant obtained Monday by The Atlanta Journal-Constitution. An official autopsy is pending. Fulton County jail officials said Lamora Williams waived her first appearance in court Monday on felony murder charges. >> Read more trending news The arrest warrant alleges Williams put her sons in the oven sometime between midnight Thursday and 11 p.m. Friday. Williams called her sons’ father, Jameel Penn, on Friday night and showed him by video chat that something was wrong in her Atlanta apartment home. Penn said he immediately called the police. When officials arrived at the Oakland City West End Apartment complex, the boys, 2-year-old Ke’Younte Penn and 1-year-old Ja’Karter Williams, were dead. Related: 2 children found dead in Atlanta apartment; mother charged Friends and family members of Williams told the AJC she suffered from undiagnosed mental health problems that were exacerbated by her father’s death when she was 19 and by having four children younger than 7. They said she was also a single mother who had some help from Penn, but not enough considering her mental health. Williams’ longtime friend Neesa Smith said Williams quit a job about a month ago because she couldn’t find a babysitter for the kids. “Nobody could tell what she was going through,” Smith said. Williams’ sister, Tabitha Hollingsworth, said Williams is at risk and should be put on suicide watch in the Fulton County Jail, where she remains without bond.