Russia Hitting NATO Even Accidentally Will Spur 'Full' Response: Sullivan

White House national security adviser Jake Sullivan warned in an appearance on CBS' Face the Nation Sunday morning that if Russia hits any part of NATO territory, a "full" response will unfold.

"The president 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. If there is a military attack on NATO territory, it would cause the invocation of Article Five and we would bring the full force of the NATO alliance to bear in responding to it," he told host Margaret Brennan.

His statement comes after Russia launched a rocket attack Sunday morning that was 15 miles away from the border with Poland, which is a NATO member. The attack killed at least 35 people and wounded 134 others, according to Lviv Governor Maksym Kozytskyy. The missiles had hit a training military base that is located near the Ukrainian city of Yavoriv. The facility was used to train Ukrainian military personnel and hosted NATO military drills.

Brennan on Sunday asked Sullivan if "that was an accidental errant shot?" to which he responded: "All I will say is that if Russia attacks, fires upon, takes a shot at NATO territory, the NATO alliance would respond to them."

Most Americans are concerned that Russia will expand its invasion beyond Ukraine, according to the latest CBS News poll. The survey, which was conducted between March 8 and 11, found that 69 percent of Americans think Russia "plans to invade other countries in Europe" as opposed to 31 percent who believe it will invade only Ukraine.

However, retired Army general Barry McCaffrey said that Russia taking over Western Europe is "not even in the cards."

"The Russians would be squashed if they tried to attack Poland, Romania, never mind a massive movement to take Western Europe. It's not even in the cards," he said on Sunday during a TV appearance on MSNBC. "However, what is in the cards is that NATO has now pulled itself together in dramatic fashion. I think Biden's team [has] been brilliant in the way they handled this, moved forward as an alliance, not as a U.S. unilateral move."

On Sunday, NATO said that it doesn't have any personnel in Ukraine at the moment, according to the Associated Press. However, the U.S. in February sent 3,000 more soldiers to Poland, ABC News reported.

Several Russian military airstrikes have hit parts of Ukraine this weekend, including an evacuee train in the country's north region. Pavlo Kyrylenko, the head of the Donetsk regional administration, said Sunday that the train was damaged, with one person dead and another wounded.

Russia Hitting NATO Will Spur Response: Sullivan
White House National Security Adviser Jake Sullivan warned that if Russia hits any inch of NATO territory, a "full" response will unfold. Above, Sullivan speaks during the daily White House press briefing on February 11 in Washington, DC. Photo by Anna Moneymaker/Getty Images