Lviv (Ukraine), Mar 13 (AP): Waves of Russian missiles pounded a military training base in western Ukraine on Sunday, killing 35 people in an attack on a facility that served as a crucial hub for cooperation between Ukraine and the NATO countries supporting it in its defense against Moscow's grinding assault.

More than 30 Russian cruise missiles targeted the sprawling facility, which lies not far from the border with NATO member Poland and that has long been used to train Ukrainian military personnel, often with instructors from the U.S. and other countries in the western alliance.

Poland is also a transit route for Western military aid to Ukraine, and the strikes followed Moscow's threats to target those shipments. An attack so close to the border was heavy with symbolism in a conflict that has revived old Cold War rivalries that gave birth to NATO and threatened to rewrite the current global security order.

Since Russia's invasion more than two weeks ago, at least 596 civilians have been killed, according to the U.N., though it believes the true toll is much higher. Millions more have fled their homes amid the largest land conflict in Europe since World War II.

Despite its superior firepower, Russia has struggled in its advance across Ukraine, in the face of stiffer than expected resistance, bolstered by Western weapons support. Instead, Russian forces have besieged several cities and pummeled them with strikes, hitting two dozen medical facilities and leading to a series of humanitarian crises.

Many civilians have been caught in the barrage, and Ukraine's Prosecutor General's office said Sunday that at least 85 children have been killed. An American journalist was killed and another wounded when their car was fired upon at a Russian checkpoint Sunday, police said.

Meanwhile, U.S. President Joe Biden is sending his national security adviser to Rome to meet Monday with a Chinese official amid concerns that country is amplifying Russian disinformation, and Pope Francis called for peace.

The attacked training base near Yavoriv is less than 25 kilometers (15 miles) from the Polish border and appears to be the westernmost target struck during Russia's 18-day invasion.

The base has hosted international NATO drills and a senior NATO official, Admiral Rob Bauer, previously hailed it as embodying “the spirit of military cooperation" between Ukraine and international forces. As such, the site is a potent symbol Russia's longstanding concerns that the 30-member Western military alliance is a threat to Moscow by operating so close to its territory.

NATO denies that it poses any threat, but Russia has repeatedly demanded Ukraine drop its ambitions of joining the alliance as a pre-requisite for ending the war.

Lviv governor Maksym Kozytskyi said most of the Russian missiles fired Sunday “were shot down because the air defense system worked.” Those that got through killed at least 35 people and wounded 134, he said.

Russian fighters also fired at the airport in the western city of Ivano-Frankivsk, which is less than 150 kilometers (94 miles) north of Romania and 250 kilometers (155 miles) from Hungary, countries that also are NATO allies.

NATO said Sunday that it currently does not have any personnel in Ukraine, though the U.S. has increased the number of American troops deployed to Poland. White House national security adviser Jake Sullivan said the West would respond if Russia's armaments travel outside Ukraine and hit any NATO members, even accidentally.

Biden “has been clear, repeatedly, that the United States will work with our allies to defend every inch of NATO territory and that means every inch,” Sullivan said on CBS News' “Face the Nation.” Sullivan is headed to Rome on Monday to meet with senior Chinese foreign policy adviser Yang Jiechi. Their talks will center on “efforts to manage the competition between our two countries and discuss the impact of Russia's war against Ukraine on regional and global security,” said Emily Horne, speaking for the White House national security council.

Lviv itself so far has been spared the scale of destruction unfolding to its east and south. The city's population of 721,000 has swelled during the war with residents escaping bombarded population centers and as a waystation for the nearly 2.6 million people who have fled the country.

Ukrainian and European leaders have pushed with limited success for Russia to grant safe passage to civilians trapped by fighting, though Ukrainian President Volodymyr Zelenskyy said authorities have managed to evacuate nearly 125,000 people from combat zones.

Ukrainian authorities said more than 10 humanitarian corridors would open Sunday, with agreement from Russia, including from the battered and besieged port city of Mariupol, where the city council said 2,187 people have been killed.

The suffering in the port city is “simply immense,” the International Committee of the Red Cross said Sunday, noting that hundreds of thousands of its residents are “facing extreme or total shortages of basic necessities like food, water and medicine.” “Dead bodies, of civilians and combatants, remain trapped under the rubble or lying in the open where they fell,” the Geneva-based organisation said in a statement. “Life-changing injuries and chronic, debilitating conditions cannot be treated.” Zelenskyy said in a video address that a convoy carrying 100 tons of humanitarian aid was headed to the city, whose capture could help Russia establish a land corridor to Crimea, which it seized from Ukraine in 2014. (AP) MRJ

(This story is published as part of the auto-generated syndicate wire feed. No editing has been done in the headline or the body by ABP Live.)