BERGA, Sweden (Reuters) - Ukraine has the right according to international law to attack legitimate military targets in Russia to defend itself, NATO Secretary General Jens Stoltenberg said during a visit to new alliance member Sweden on Friday.

U.S. President Joe Biden on Friday for the first time publicly apologized to Ukraine for a monthslong holdup in American military assistance that let Russia make gains on the battlefield, as Ukrainian President Volodymyr Zelenskyy appealed for bipartisan U.

The Biden administration's decision to allow U.S. weapons to be used for attacks within Russia has weakened the Kremlin and will rally allies.