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The latest developments in the conflict between Russia and Ukraine. All times EDT.

12:15 a.m.: U.S. President Joe Biden said Tuesday he decided to provide Ukraine with “more advanced rocket systems and munitions” as part of U.S. efforts to help the Ukrainian fight against a Russian invasion now in its fourth month.

Biden wrote in an opinion piece in The New York Times that the United States has aided Ukraine with weapons and ammunition in order to bolster its position on the battlefield and ultimately in peace negotiations with Russia.

“Unprovoked aggression, the bombing of maternity hospitals and centers of culture, and the forced displacement of millions of people makes the war in Ukraine a profound moral issue,” Biden said.

Biden wrote Tuesday that he does not seek war with Russia.

“As much as I disagree with Mr. Putin, and find his actions an outrage, the United States will not try to bring about his ouster in Moscow,” Biden said. “So long as the United States or our allies are not attacked, we will not be directly engaged in this conflict, either by sending American troops to fight in Ukraine or by attacking Russian forces. We are not encouraging or enabling Ukraine to strike beyond its borders.”

12:01 a.m.: Russian opposition figure and jailed Kremlin critic Alexei Navalny could face 15 more years under a new charge, The Associated Press reported.

Navalny took to social media Tuesday to say he now has been charged with starting an extremist organization. There has been no official announcement about new charges against Navalny.

Navalny was jailed last year when he returned to Russia after receiving medical treatment in Germany following a poison attack with a Soviet-era nerve agent during a visit to Siberia in 2020. Navalny blamed Putin for the attack.

He is currently serving a two-and-a-half-year sentence in a prison camp east of Moscow on a 2014 embezzlement conviction. Navalny has been a longtime outspoken critic of the government, including calling the Russian invasion of Ukraine, “stupid” and “built on lies.”

Last year, Navalny’s foundation was outlawed after being labeled “extremist” by authorities, who blocked tens of websites run by his network.

Some information in this report came from The Associated Press.