The nerve agent used to poison former Russian spy Sergei Skripal and his daughter at his home in England last month was delivered in a liquid form, the BBC reported officials as saying.
Skripal, 66, and his daughter Yulia were found slumped on a bench in the city of Salisbury on March 4.
The BBC said the Department for Environment, Food and Rural Affairs which is handling a clean-up operation in Salisbury had said a “very small amount” of Novichok was used with the substance delivered in a “liquid form”.