The new reporting comes four months after The Redacted's Dan Cohen reported the U.S. would send DU rounds to Ukraine.
In February, a top British defense official announced that the United Kingdom would supply Ukrainian forces with DU rounds, dismissing warnings from Moscow that the Russian government would regard the deployment of such weapons as an act of nuclear war.
Reacting to news that the U.S. will likely supply Ukraine with DU munitions, Putin said Tuesday that "we have many such weapons, and if they use them, we will also reserve the right to use similar munitions," according to the state news agency TASS.
"There's nothing good about it, but, if need be, we can do it," he added. "We don't need to do it."
The Journal report prompted warnings from anti-war voices about the dangers of DU munitions.
"If you love Ukraine, if you care about Ukraine, depleted uranium is the last thing you would tell them to use," British journalist Richard Medhurst said on his video podcast Tuesday. "If you look at what the United States has done, everywhere they've used depleted uranium, it's like dropping a nuclear bomb."
Medhurst added that in Fallujah, Iraq—where U.S. forces used DU rounds during two attempts to capture the city in 2004—"you have higher rates of birth defects and congenital heart disease... than you did in Hiroshima and Nagasaki."
DU rounds are highly effective at penetrating the armor of most modern tanks and armored fighting vehicles. The U.S. Abrams, British Challenger 2, and German Leopard 2 main battle tanks, along with U.S. Bradley Fighting Vehicles that are being sent to Ukraine, can all fire DU munitions. The ammunition can also be fired from warplanes or field artillery.
However, exploding DU shells produce radioactive dust that contaminates soil, water, and air for many years after their use. U.S. Army training manuals caution that DU contamination "will make food and water unsafe for consumption" and require soldiers to wear protective clothing when in or near contaminated areas.
U.S. and allied forces used DU munitions during the 1991 and 2003-11 invasions of Iraq, and in Syria during the war against Islamic State militants. Miscarriages, birth defects, and cancers soared in Iraq after both wars.
According to one study, more than half of the babies born in Fallujah between 2007 and 2010 had birth defects. Among pregnant women in the study, over 45% experienced miscarriages in the two-year period following the battles for Fallujah. Geiger counter measurements of DU-contaminated sites in Iraqi cities have consistently shown radiation levels 1,000 to 1,900 times greater than normal.
The U.S.-led NATO coalition that waged the 1999 air war against Yugoslavia also used DU munitions, which experts believe are responsible for a surge in leukemia in the region, both among the local population and foreign troops deployed in the war zone.
Peace groups have long campaigned for a ban on DU munitions. Last September, the United Nations General Assembly approved an Indonesian draft resolution urging further research of the "health risks and environmental impact" of DU weapons and calling for a "cautionary approach" to their use.
The resolution was approved by 147 nations. The U.S., U.K., France, and Israel voted against the proposal.