Russian Missiles Strike Ukrainian Military Training Base Near Polish Border

Footage on social media showed destroyed buildings and a parade ground strewn with debris, with smoke rising from the ruins. The strike injured 134 people and destroyed and damaged some barracks, according to the governor’s office in Lviv.

The Russian strikes could impede what has been a vital lifeline for Ukraine and bring the war perilously close to the country’s border with Poland.

Armaments supplied to Ukraine by the U.S. and its European allies—especially antitank and antiaircraft weapons—have played an important role in checking the advance of Russian ground troops, who have suffered heavy casualties in the north as they have attempted a vast encirclement of the Ukrainian capital, Kyiv.

The strike on the training facility comes as Moscow has shown off its ability to bomb targets throughout the country even as its ground troops near Kyiv have faced setbacks.

Missiles also hit an airport near the city of Ivano-Frankivsk in western Ukraine on Sunday morning, the third attack on the city since the invasion began, the mayor said. On Saturday, cruise missiles slammed into an airport south of Kyiv, setting fire to an oil terminal and an ammunition depot, authorities said.

Earlier in the war, NATO allies openly publicized the arms shipments they were sending into Ukraine. In the first week of the war, governments such as the Czech Republic and Poland shared news of their deliveries on

Facebook

and

Twitter.

Arms are still flowing into the country, but allies have become more discreet in how widely they disclose the shipments. At least seven military cargo jets from NATO allies landed on Saturday alone in Rzeszow, at a small airport in southern Poland that has become the staging ground for supplies going into Ukraine.

“We’re making deliveries every day in terms of what we can do in terms of assistance, and in particular when you look at what we’re doing as it relates to antitank and defense systems,” Vice President Kamala Harris said Thursday. “That is an ongoing process and that is not going to stop, to the extent there is a need.”

On Saturday, President Biden authorized $200 million in new security assistance to Ukraine, bringing the total authorized U.S. security assistance to the nation this year to $1.2 billion, according to a White House official.

On Saturday, Russia’s deputy foreign minister,

Sergei Ryabkov,

said that Moscow viewed arms deliveries to Ukraine as legitimate military targets.

Areas no longer controlled by Ukraine as of Friday

Direction of invasion forces

Controlled by or allied to Russia

Primary refugee crossing locations

Chernobyl

Not in operation

Ukraine territory, recognized by Putin as independent

Controlled by

separatists

Areas no longer controlled by Ukraine as of Friday

Direction of invasion forces

Controlled by or allied to Russia

Ukraine territory, recognized by Putin as independent

Primary refugee crossing locations

Chernobyl

Not in operation

Controlled by

separatists

Areas no longer controlled by Ukraine as of Friday

Direction of invasion forces

Controlled by or allied to Russia

Primary refugee crossing locations

Ukraine territory, recognized by Putin as independent

Chernobyl

Not in operation

Controlled by

separatists

Areas no longer controlled by Ukraine as of Friday

Direction of invasion forces

Controlled by or allied to Russia

Primary refugee crossing locations

Ukraine territory, recognized by Putin as independent

Areas no longer controlled by Ukraine as of Friday

Direction of invasion forces

Controlled by or allied to Russia

Primary refugee crossing locations

Ukraine territory, recognized by Putin as independent

“We have warned what kind of consequences the thoughtless transfer of weapons, such as portable air-defense systems and antitank systems, into Ukraine could have,” he said, speaking on state television. “It is the U.S. that is the source of maximum tension.”

The military base targeted by Russia on Sunday sits near a thoroughfare leading between Poland and Lviv, a city in western Ukraine that has been serving as a major logistical hub.

The U.S. training mission evacuated from the base in mid-February, when the White House was warning of an impending invasion of Ukraine. On the base, Ukrainian troops were being trained to use U.S.-supplied Javelin antitank weapons systems, a potent weapon against Russian armor.

Ukraine’s military said at a briefing in Lviv on Sunday that a Russian bomber, based in the Russian provincial city of Saratov, launched the rockets from over the Black Sea. Ukrainian antiaircraft systems destroyed most of them, but eight reached their target on the military base.

Russia has had limited success in disrupting supply convoys or other military road traffic in Ukraine since the beginning of its invasion two weeks ago. Ukrainian troops, tanks and other weaponry on the move are a frequent sight on highways during daylight hours.

The attack on an area so close to the Polish border also illustrates the potential risk to the hundreds of thousands of refugees who are using that corridor to flee the country.

Though Russia’s offensive appears to be bogged down by fierce Ukrainian resistance and logistical problems, Russia has said it is going according to plan. In Moscow, Russian Defense Ministry spokesman Igor Konashenkov said on Sunday that Russian forces shot down a Ukrainian Sukhoi Su-24 plane and two Ukrainian drones. He didn’t address the strikes on the training center.

In total, 99 military aircraft and 128 Ukrainian army drones have been destroyed since the beginning of what the Kremlin has described as the “special military operation,” Maj. Gen. Konashenkov said. In addition, nearly 3,700 Ukrainian military infrastructure facilities were put out of action and about 1,200 tanks and other armored combat vehicles had been destroyed along, he added.

Cruise missiles slammed into an airport south of Kyiv, setting fire to an oil terminal and an ammunition depot, authorities said. Russian strikes also hit suburbs to the east and west and a drone crashed in the center of the city after being shot down, setting fire to a bank, officials said.

In a press conference Saturday, Ukrainian President

Volodymyr Zelensky

said Russian forces could take large chunks of the country but wouldn’t manage to hold on to any gains. Protesters have already greeted Russian forces in cities they are occupying.

In a separate video address released early Saturday, Mr. Zelensky decried what he said was the abduction by Russian forces of the mayor of the southern city of Melitopol, who had refused to cooperate with occupying troops and continued to display a Ukrainian flag in his office.

—Drew Hinshaw in Warsaw contributed to this article.

Write to Alan Cullison at alan.cullison@wsj.com and Brett Forrest at brett.forrest@wsj.com