Andrei Kozyrev, the former Russian minister of foreign affairs, spoke with ABC News Live about the ongoing Ukrainian-Russian conflict and Russian President Vladimir Putin, who he says was a friend.

"I don't know what happened inside his head, but it's different person, especially politically, it's totally different," he said. "I know that there are positive situations when a soul becomes full. But perhaps there is room for reverse, you know, when a good person becomes a bad person, and serving this regime, it just makes me feel sick, that he's doing that."

Kozyrev said Putin has been making several miscalculations, particularly with how Ukrainians and the West would react.

He added that he believes Putin's inner military circle would prevent him from using the "nuclear button."

"They risk everything, their families, because the nuclear war is a doomsday machine for everyone. It's suicidal. So somebody will stop him," he said.

-ABC News' Nadine Shubailat, Zoe Magee and Rahma Ahmed

Canada announced that it will prohibit "Russian-owned, chartered, or operated aircraft" from entering its airspace, effective immediately.

"All of Canada is united in its outrage of President Putin’s aggression against Ukraine," Omar Alghabra, Canada's minister of transport, said in a statement. "The government of Canada condemns Russia’s aggressive actions and we will continue to take action to stand with Ukraine.”

Canada's announcement comes hours after the European Union issued a similar ban over its airspace.

-ABC News' Matt Foster

Oil giant BP announced it would exit its 19.75% shareholding stake in Rosneft, the key Russian state oil company, because of Russia’s invasion of Ukraine.

BP’s CEO Helge Lund said in a statement the invasion “represents a fundamental change” and that its involvement with Rosnef “simply cannot continue.”

"The BP board believes these decisions are in the best long-term interests of all our shareholders," Lund said.

The two BP nominated directors will resign from Rosneft's board immediately and the company will no longer report reserves, production or profit for Rosneft, according to the company.

-ABC News' Patrick Reevell

Ukrainian President Volodymyr Zelenskyy provided an update to the invasion and gave a pessimistic outlook on possible diplomatic solutions with Russia.

In a three-minute televised speech, Zelenskyy said he talked with Belarusian leader Alexandr Lukashenko for the first time in two years.

Lukashenko suggested that Russian and Ukrainian delegations meet at the Belarus-Ukraine border for negotiations-- something Ukraine agreed to earlier Sunday but Zelenskyy said he told Lukashenko he does not believe there will be a breakthrough or tangible outcome in talks with Russian representatives.

Zelenskyy said he doesn't want there to be any doubt whatsoever that as president of Ukraine he didn't try to stop this war.

Lukashenko made assurances that troops wouldn't move from Belarus into Ukraine and missiles wouldn't being launched from his territory, according to Zelenskyy.

Zelenskyy said the government will stay and continue to fight for Ukraine's independence, sovereignty and territorial integrity and will not concede any ground.

He added that Ukraine's military members will receive a monthly salary of 100,000 Hryvnya, roughly $3,350, until the war is over.

-ABC News' Christine Theodorou

Secretary of State Antony Blinken closed his remarks to the U.N. Security Council meeting by challenging the Russian Federation to "announce today -- with no qualification of equivocation or deflection -- that Russia will not invade Ukraine, stated clearly stated plainly, to the world."

"And then demonstrate it by sending your troops, your tanks, your planes back to their various can hangars and sending your diplomats to the negotiating table," he added.

Blinken laid out how the U.S. believes Russia will attack Ukraine -- but said he would welcome being wrong and for Russia to withdraw.

"Now, I'm mindful that some have called into question our information, recalling previous instances where intelligence ultimately did not bear out," he said, apparently referring to a similar address then-Secretary of State Colin Powell famously made to the Security Council presenting U.S. intelligence to justify the Iraq War. "But let me be clear, I am here today not to start a war, but to prevent one," he said, citing allies that agree with U.S. assessments.

"If Russia doesn't invade Ukraine, then we will be relieved that Russia changed course and proved our predictions wrong. That would be a far better outcome in the course we're currently on. And we'll gladly accept any criticism that anyone directs at us," Blinken said.

He continued, "Russia can still make if there's any truth to his claim that is committed to diplomacy. Diplomacy is the only responsible way to resolve this crisis"

Blinken also said that he sent a letter to Russia's Foreign Minister Sergei Lavrov earlier Thursday proposing that they meet next week in Europe following their talks in recent weeks "to discuss the steps that we can take to resolve this crisis without conflict" and that U.S. is also proposing meetings at the NATO Russia Council and the OSC Permanent Council.

"These meetings can pave the way for a summit with key leaders in the context of de-escalation to reach understandings on our mutual security concerns," he added.