Russia has accused the US of developing a chemical and biological weapons programme along its borders.

The claims came Thursday at the same time as the UK and the Netherlands were accusing Russian spies of being behind an attempted attack on the OPCW in the Hague.

General-Major Igor Kirillov, commander of Russia’s radiological, chemical and biological defence troops, said Moscow based its conclusion on documents released by former minister of Georgian state security, Igor Giorgadze.

The general said Russia agreed with Mr Giorgadze's assertion that Georgia was running a chemical and biological weapons laboratory on behalf of the Pentagon. The Richard Lugar Research Center near Tbilisi had a suspicious extension built in recent years, he said, with two floors expressly devoted to the US military. Georgian staff had very limited access to these floors – and it was this reason alone that they had been unable to produce evidence of chemical weapons.

Slide after slide, laser pen circle after laser pen circle, the Russian general hinted at the evil intent of US plans.

There were documents showing permission for biological matter to be carried in US diplomatic briefcases into Georgia (“what could that be for?” asked the general). Contracts for research into rabies, dengue fever, anthrax, atypical plague and other infectious diseases (“why those diseases?”). A contract for the collection of Russian genetic data (“could that really be for innocent medical research?”). There were patents for bullet-like “delivery capsules” (“that’s evidence of contactless warfare”).

The general then presented a map showing labs “controlled by the Pentagon” in countries around Russia’s borders.

“Russia will not allow the United States to carry out biological experiments near its borders,” he declared.

Russia cyber attacks: UK ambassador to the Netherlands praises Dutch intelligence services

No questions and answer session was offered. But few of the audience of military attaches and journalists gathered – most of whom had by now very sore heads – will have failed to notice the unusual timing of the event.

The press conference had been hastily announced late on Wednesday, at a moment that Russia likely understood it would soon be announced that four of its citizens had been expelled from the Netherlands over an attempted cyberattack on the OPCW. The bulk of Mr Giorgadze’s accusations, meanwhile, were already clear on 11 September, when he accused the US of carrying out experiments on people.

The US and Georgia angrily rejected those claims within a day. They say the Richard Lugar Centre is aimed purely at reducing bio-risk, and containing diseases from spreading globally.