Intelligence: Putin ordered secret biolab built on island, so protected that fishing is banned, and its own guards fear infection

Ukraine's Defense Intelligence (HUR) says it has found evidence that Russia is running a network of secret biolabs. It was discovered on Lisy Island in Russia's Tver Oblast, where Russia conducts experiments with dangerous viruses and pathogens for military purposes.

Since Russia started its war against Ukraine, Moscow has repeatedly claimed Ukraine hosts secret US-funded biological weapons labs, a narrative it used to help justify its invasion, and which international bodies have rejected. The UN said in 2022 it was not aware of any biological weapons program in Ukraine, and Ukraine, which denies ever developing such weapons, now points the same charge back at Russia.

What HUR alleges

The facility has an official name and origin. The object in the middle of the Vyshnevolotsk reservoir, called the "Center for Experimental Physiology", was created on the orders of Russian President Vladimir Putin to "ensure the defense capability and security" of the country, according to HUR.

Since 2023, the waters around the island housing biological laboratories have been closed to fishing, swimming and boating, having been designated a “specially protected area of regional significance.”

The facility is protected from the air by air-defense missile crews, while the Kremlin has placed Defense Minister Andrei Belousov in charge of its security. Soldiers guarding the site have privately expressed fears of being infected with an unknown “nasty bug.”

HUR warns of a contamination risk

HUR has framed the lab's location as a hazard. The reservoir supplies fresh water to several settlements, including the town of Vyshnii Volochok, and feeds the Tvertsa River, which flows into the Volga River.

If dangerous pathogens or chemicals from the labs entered the reservoir, the consequences of epidemics and infections could be catastrophic not only for the region's population but for all of Russia.

HUR links it to a 2026 epidemic

The report has connected the lab to a recent outbreak. In spring 2026, an epidemic of foot-and-mouth disease in cattle broke out in Russia, which the Kremlin tried to hide from the world and its own population, HUR said.

It is not excluded that this and other similar cases could be the result of failed Russian experiments with viruses, bacteria, and other pathogens, HUR suggested. That claim, like the existence and purpose of the lab itself, rests on HUR's account and cannot be independently verified, but the accusation lands against the documented history of Russia weaponizing the biolab narrative against others.