A Pennsylvania woman was charged Monday with murdering two of her children, more than two months after they were found hanging from a beam in the family’s basement, the authorities said.

The woman, Lisa Snyder, 36, who was arrested at her home in Albany Township, Pa., on Monday morning, had told the police that her 8-year-old son had been bullied at school and was suicidal, the authorities said. But their investigation found no evidence of bullying and also showed that the boy had a physical disability that would have made it nearly impossible for him to hang himself, prosecutors said.

“Eight-year-olds, generally that I am aware, do not commit suicide,” John T. Adams, the Berks County district attorney, said during a news conference on Monday. “So, of course we had questions.”

Ms. Snyder, who was also charged with two counts of endangering the welfare of children and one count of tampering with evidence and is being held without bail, denies killing her children and maintains they died by suicide, according to Mr. Adams.