Three young girls found dead in a Maryland house on Friday were fatally stabbed by an older brother of one of the children, according to Prince George's County police.
Police were called just after 7:30 a.m. Friday morning to a scene that police spokeswoman Jennifer Donelan referred to as "one of the most hard scenes that our officers arrived on".
Williams had "sole custody" of the girls overnight Friday, and was arrested after police say he confessed to the killings. He lives on the same street as the home where the three young girls were found dead.
Late Friday night, investigators announced 25-year-old Antonio Williams had been arrested in connection to the three girls' deaths.
The 25-year-old man has been charged in connection with the deaths of his 6-year-old sister Nadira Withers, as well as 9-year-old Ariana Decree and 6-year-old Ajayah Decree.
Jennifer Donelan, a spokeswoman for Prince George's County police, said: "This is one of the most hard that our officers have arrived on". The three girls had suffered multiple stab wounds.
The cousins were from Newark, New Jersey, and are the daughters of Williams' mother's cousin.
Police discovered their bodies in a Clinton, Maryland home around 7:30am on Friday. They said he did not provide a reason for the attack. He was charged with three counts of murder as well as with related charges, police said. "Those that responded here today are parents, aunts, uncles of young children that they love very much".
Assistant Police Chief Hector Velez said the entire community is mourning the "three attractive young children", The Washington Post reported. "We want to assure the community that the Prince George's County Police Department will work tirelessly to find the person or persons responsible for these children's deaths".