The emergency UN Security Council meeting was meant as an eleventh hour effort to dissuade Russia from sending troops into Ukraine. But the message became moot even as it was being delivered.

While diplomats at UN headquarters were making pleas for Russia to back off — “Give peace a chance,” Secretary-General Antonio Guterres implored — Russian President Vladimir Putin went on television in his homeland to announce a military operation that he said was intended to protect civilians in Ukraine.

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Putin warned other countries that any effort to interfere with the Russian operation would lead to “consequences they have never seen.”

The council, where Russia holds the rotating presidency this month, gathered Wednesday night hours after Russia said rebels in eastern Ukraine had asked Moscow for military assistance. Fears that Russia was laying the groundwork for war bore out about a half hour later.

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“It’s too late, my dear colleagues, to speak about de-escalation,” Ukrainian Ambassador Sergiy Kyslytsya told the council. “I call on every one of you to do everything possible to stop the war.”

In a spontaneous exchange not often seen in the council chamber, Kyslytsya challenged his Russian counterpart to say that his country wasn’t at that very moment bombing and shelling Ukraine or moving troops into it.

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“You have a smartphone. You can call,” officials in Moscow, Kyslytsya said.

“I have already said all I know at this point,” Russian Ambassador Vassily Nebenzia responded.

He added that he didn’t plan to wake up Russia’s foreign minister — and said that what was happening was not a war but a “special military operation.”

Kyslytsya dismissed that description outside the meeting as “lunatic semantics.”

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At the council’s second emergency meeting this week on Ukraine, members found themselves delivering prepared speeches that were instantly outdated. Some ultimately reacted in a second round of hastily added remarks.

“At the exact time as we are gathered in the council seeking peace, Putin delivered a message of war, in total disdain for the responsibility of this council,” US Ambassador Linda Thomas-Greenfield said.

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She added that a draft resolution would be circulated to the council Thursday.

The resolution would declare that Russia is violating the UN Charter, international law and a 2015 council resolution on Ukraine, a European diplomat said, speaking on condition of anonymity because the discussions were private. The resolution would urge Russia to come back into compliance immediately, the diplomat said.

Earlier Wednesday, diplomats from dozens of countries took the floor at the UN General Assembly to deplore Russia’s actions toward Ukraine and plead for dialogue, while Russia and ally Syria defended Moscow’s moves.