MOSCOW, March 19 - RAPSI. Local authorities in Russia's Pskov Region have launched a criminal investigation into the alleged negligence in the processing of adoption documents of Maxim Kuzmin (renamed Max Alan Shatto), whose recent death in the US provoked an enormous outcry in his home country, the Investigative Committee reported Tuesday.

"The social services failed to provide full information on the biological parents of the boys (Maxim and his brother) to the court that was considering his adoption by US parents," the committee said in a statement.

Specifically, according to the committee, one of the children's grandmothers was interested in remaining in touch with and visiting the boys, but this information was not relayed to the court.

Investigators will also assess the actions of the officials who were responsible for checking the documents that refused to grant custody of the child to the relatives of their biological parents, or to search for adoptive parents in Russia.

Children's Rights Commissioner Pavel Astakhov announced the death of the boy on February 18. He tweeted that the child had been given powerful "psychotropic substances," and he was badly beaten before he died in a hospital on January 21.

On March 1, the Texas authorities announced that the boy's death was not criminal based on the autopsy results. The four doctors who reviewed the results ruled the death accidental.

Initially, the investigators did not rule out that his adoptive parents Alan and Laura Shatto could be charged with neglect in the boy's death.

Ector County District Attorney Bobby Bland stated on Monday that his office will not charge the adoptive parents in the January 21 death of the boy.

Meanwhile, the Foreign Ministry said the decision not to bring charges against his adoptive parents raises "serious concerns" in Russia.

"The ombudsman, the Investigative Committee, and the Foreign Ministry will insist that the US authorities provide all of the materials in the Maxim Kuzmin case," his press service said.

The Shattos adopted Max and his biological half-brother, two-year-old Kristopher, aka Kirill, from the same orphanage in western Russia.

Since the boy's death, his brother has remained with his adoptive parents.