SEOUL, South Korea (AP) — North Korea says leader Kim Jong Un has returned home from a trip to Russia where he deepened a “comradely fellowship and friendly ties” with President Vladimir Putin. The state media report Tuesday didn’t give many specifics on the six-day trip that was Kim’s longest foreign travel as leader. Kim visited several military sites in Russia and said in live comments last week that his country offered full and unconditional support to Putin. His comments and itinerary raised concerns about possible arms deals in which North Korea could provide ammunition for Russia’s war in Ukraine in return for receiving Russian technologies to modernize his nuclear weapons arsenals.