Russia-Ukraine updates: Putin suspends key US-Russia nuclear treaty in speech denouncing West

Russian forces have retreated not just from the city of Kherson, but the rest of Kherson province that surrounds the city and lies north of the Dnipro River.

The Russian Ministry of Defense said that its 30,000 troops have now crossed to the other bank of the river, a figure that is in line with how many forces U.S. officials had estimated were in Kherson.

Russians claimed they are continuing to shell areas around Kherson that they’ve just left, which could be a concern for Ukrainian troops who will be in the range of Russian artillery fire while in the city.

Russia also claimed that fire damage is being inflicted on the accumulations of manpower and military equipment of the Ukrainian armed forces on the right bank of the Dnipro River.

-ABC News' Luis Martinez

Russian forces have completed their retreat from the Ukrainian city of Kherson, the Russian Ministry of Defense said, saying the last of its troops crossed over to the other side of the Dnipro river.

In a statement carried by Russia's state news agencies, the ministry said the withdrawal was completed at 5 a.m. Moscow time on Friday.

-ABC News' Patrick Reevell

The Pentagon announced a new $400 million defense package for Ukraine on Thursday.

The new aid will include four short-range Avenger air defense systems, which is a first for the packages approved for the war in Ukraine. It will also include more missiles for HAWK air defense systems, more anti-aircraft Stinger missiles, HIMARS ammunition, precision-guided artillery rounds and Humvees.

The Ukrainians will need some training on the Avengers, according to Deputy Pentagon press secretary Sabrina Singh, who did not give an estimate on when the systems might arrive and be ready to use.

With this latest drawdown, the U.S. has now committed more than $18.6 billion for the war since Russia invaded Ukraine on Feb. 24.

-ABC News' Matt Seyler

A new U.S. assessment estimates 100,000 Russians have been killed or wounded in the war in Ukraine, according to Gen. Mark Milley, the chairman of the Joint Chiefs of Staff.

The U.S. last gave an estimate in early August that the number of Russians killed and wounded was between 70,000 and 80,000.

"There has been a tremendous amount of suffering, human suffering, you're looking at maybe 15, 20, 30 million refugees, probably 40,000 Ukrainian innocent people who are civilians have been killed as collateral damage," said Milley.

He added, "You’re looking at well over 100,000 Russian soldiers killed or wounded, same thing probably on the Ukrainian side."

He pointed out that Russia invaded Ukraine with a force of 170,000 troops.

-ABC News' Luis Martinez