Robert De Niro’s 19-year-old grandson, Leandro De Niro Rodriguez, died after taking fentanyl pills, his mother said.

Drena De Niro confirmed her son’s death on Instagram on Monday, but a fan asked in the comments what caused her death.

“Somebody sold him fentanyl pills knowing they were,” Drena wrote on her Instagram account on Tuesday.

Drena’s immense loss was evident in the words she added to her online response.

“I mean, my son is gone forever because of people who are still playing around selling and buying this shit,” she said.

The death of famed actor Robert De Niro’s grandson is now being investigated as a possible overdose.

His body was found Sunday inside his lower Manhattan apartment with a white powdery substance and drug paraphernalia nearby, police sources said. new york post. Official autopsy and toxicology reports have not yet been submitted.

Robert De Niro released a statement shortly after learning of his grandson’s death. (Related: Robert De Niro Becomes a Dad Again at 79)

“I am deeply saddened by the loss of my beloved grandson Leo. We greatly appreciate your condolences. We kindly ask you to give us some privacy so that we can mourn Leo’s passing,” he said. said to have spoken. rolling stone.

A New York City Police Department detective in the Lower Manhattan Drug District has been taken into custody to investigate the case and possibly track down those responsible for the drug sale, according to the New York Post. .