President Vladimir Putin has warned South Korea it would be making “a big mistake” if it arms Ukraine in the war against Russia.

His comments on Thursday come after Seoul said it was considering such a possibility, in response to Russia and North Korea’s new pact to help each other in the event of “aggression” against either country.

Putin told reporters Moscow would make decisions which are unlikely to please the current leadership of South Korea, should the country decide to supply arms to Kyiv

The Russian leader was speaking in Vietnam, shortly after a lavish visit to Piong-yang where he signed a mutual defence agreement with North Korean leader – Kim Jong Un.

President Putin also warned that Moscow was willing to arm North Korea if the US and its allies continue supplying Ukraine with weapons.