Biden authorizes Ukraine's use of U.S.-supplied long-range missiles for deeper strikes inside Russia

U.S. President Joe Biden has authorized Ukraine to use U.S.-supplied long-range missiles to strike deeper inside Russia, easing limitations on the weapons.

U.S. President Joe Biden has authorized Ukraine to use U.S.-supplied long-range missiles to strike deeper inside Russia, easing limitations on the weapons as Russia deploys thousands of North Korean troops to reinforce its war, according to a U.S. official and three other people familiar with the matter. 

The decision allowing Kyiv to use the Army Tactical Missile System, or ATACMs, for attacks farther inside Russia comes as President Vladimir Putin positions North Korean troops along Ukraine's northern border to try to reclaim hundreds of miles of territory seized by Ukrainian forces.

Biden's move also follows the presidential election victory of Donald Trump, who has said he would bring about a swift end to the war and raised uncertainty about whether his administration would continue the United States' vital military support for Ukraine.

The official and the others knowledgeable about the matter were not authorized to discuss the U.S. decision publicly and spoke on condition of anonymity.

Ukrainian President Volodymyr Zelenskyy's reaction Sunday was notably restrained.

“Strikes are not made with words," he said during his nightly video address. “Such things are not announced. The missiles will speak for themselves.”

Zelenskyy and many of his Western supporters have been pressing Biden for months to allow Ukraine to strike military targets deeper inside Russia with Western-supplied missiles, saying the U.S. ban had made it impossible for Ukraine to try to stop Russian attacks on its cities and electrical grids.