Russia has vowed to retaliate after it accused Ukraine of firing US-supplied ATACMS missiles at the border region of Belgorod the previous day. “On January 3, an attempt was made from Ukrainian territory to launch a missile strike against the Belgorod region using US-made ATACMS operational-tactical missiles,” the Russian defence ministry said on Saturday. “These actions by the Kyiv regime, which is supported by Western curators, will be met with retaliation,” it added, saying all the missiles were shot down.