WASHINGTON (Reuters) -The United States imposed sanctions on Thursday on a network of five groups and one person, based in Russia and the Georgian region of South Ossetia, for enabling payments between Russia and North Korea, the Treasury Department said.

Concerns over deepening military cooperation between Russia and North Korea over war in Ukraine. Russian lawmaker warns Ukrainian strikes on Russia would lead to nuclear war 15:50 A senior Russian lawmaker on Thursday said that Ukrainian strikes on Russia with western weapons would lead to nuclear war and that Moscow’s response would be tough with more powerful weapons.

Ukrainian drones hit a military depot in Russia on September 18 and destroyed North Korean missiles, intercontinental ballistic missiles, and air defenses, according to reports. More than 100 Ukrainian UAVs were used to strike the missile depot in Toropets,

North Korea sent its foreign minister to Russia for her second trip in less than a year to the major backer of Kim Jong Un’s regime. The move comes as Pyongyang readies for a parliamentary meeting that will likely approve measures that raise tensions with South Korea.

US action follows Kim Jong Un's meeting with top Russian security official to deepen ties between the two countries

North Korea launched several ballistic missiles into the East Sea on Wednesday, South Korea's military said, the isolated regime's second launch in less than a week as tensions ramp up on the Korean Peninsula.

Russian Security Council Secretary Sergei Shoigu arrived in Iran on an unannounced visit just days after he held talks in Pyongyang with North Korean leader Kim Jong Un.

A senior Russian official visited Iran on Tuesday, likely to bolster missile supplies, experts said. His visit came days after a trip to North Korea.