The government of the United Kingdom is set to proscribe Wagner, the Russian mercenary group, as a terrorist group, reports BBC.
After the declaration, it will be illegal to be a member or support the organisation.
A draft order to be laid in the British parliament will allow its assets to be categorised as terrorist property and seized.
Britain’s home secretary said Wagner was "violent and destructive... a military tool of Vladimir Putin's Russia".
She said its work in Ukraine and Africa was a "threat to global security".
Suella Braverman added: "Wagner's continuing destabilising activities only continue to serve the Kremlin's political goals."
"They are terrorists, plain and simple - and this proscription order makes that clear in UK law."
Wagner had played a key role in Russia's invasion of Ukraine, as well as operating in Syria and countries in Africa including Libya and Mali.
Its fighters have been accused of a number crimes including killing and torturing Ukrainian citizens.