The Bronze Age victims are thought to have been killed by a neighbouring, rival culture.
If confirmed, the find would be "a historic event" worthy of international attention, one minister said.
Archaeologists also found two animal skulls and three ceramic vessels at the site.
\"They take the remains out to the ground. A skull is worth something, each finger is worth something, a hand is worth something else.\"
Researchers think the aerial explosion could have destroyed the city in an instant.
Almost a gallon of pungent clear yellow fluid was discovered in an ancient bronze pot.
Johnathan Miquel Brittain, 36, Colby Adam Humphries, 28, and Ronnie Dale Norton II, 31, all from Anniston, Alabama, were arrested and charged in the thefts of as many as 150 bronze vases that were taken from grave sites at at least two cemeteries and sold to a local scrap metal shop, according to authorities and court records obtained by Newsweek.
"It is unlikely that these children and young people were killed in a massacre or conflict," one of the researchers said.
\"We are concerned that the safety of the children in this case could be seriously undermined,\" Gillibrand and Representatives Joseph P. Kennedy and Niki Tsongas wrote.
More than 1,000 military personnel were killed during the 1942 Battle of the Java Sea.
The tomb appears to be both the oldest and largest of its kind ever recorded in southern Siberia.
The toys\' purpose was unknown, but the grave belonged to a \"common child,\" as opposed to one of an elite social class.
Three of the children appeared to have been well-cared for; the fourth did not, possibly due to differences in social class.
Looking at the image "brought some people to tears."
Remains of a baby and an adult dating back 800 years were found in burial cocoons at the archaeological site.
An 800-year-old artifact of a golden rhinoceros encapsulates key aspects of South Africa's history.
The group's new issue of Dabiq magazine contains a picture of the soldier's tombstone.