ST. PETERSBURG, Fla. -- A 19-year-old female arrived at the apartment where her grandmother and great-grandmother reside to both dead around 11:30 a.m. on Sunday. It was discovered that both sustained gunshot wounds.

According to the St. Petersburg Police Department, it is believed that the daughter, 67-year-old Elizabeth Mitchell, shot her 90-year-old mother, Curley Williams. The shooting happened at the Osprey Pointe Apt., located at 5511 17th Way S., in Building C, Apt. number 7. It is believed that the daughter then shot herself.

St. Pete police continue to investigate. Stay with 10News for further details.