Russia's foreign minister has warned the US, South Korea and Japan against forming a security partnership targeting North Korea as he visited his country's ally for talks on solidifying their booming military and other co-operation.

South Korea on Wednesday repatriated six North Koreans across the maritime border in the East Sea, months after they drifted into southern waters and were rescued.

South Korea has repatriated six North Koreans who accidentally drifted into South Korean waters earlier this year. All six had consistently expressed their desire to go back, Seoul's Ministry of Unification said.

President Donald Trump campaigned on keeping the United States out of foreign wars, but it didn’t take long to convince him to come to the direct aid of Israel.

South Korea sent six North Koreans back across their sea border, months after they drifted south in wooden boats in March and May