The U.S. Department of Defense announced a new $325 million military aid package for Ukraine, including more rockets and artillery rounds, in addition to other equipment.

Defense Secretary Lloyd Austin and Gen. Mark Milley are in Europe to attend another meeting of the 50-plus countries providing military assistance to Ukraine that begins later this week in Ramstein, Germany.

"The United States will continue to work with its Allies and partners to provide Ukraine with capabilities to meet its immediate battlefield needs and longer-term security assistance requirements," the Pentagon said in a statement.

-ABC News' Luis Martinez

The German government announced Tuesday that it delivered a Patriot missile defense system and missiles to Ukraine this week.

The country also sent 16 Zetros trucks, bringing its total to 76, and two border patrol vehicles, bringing its total to 124, the government said.

-ABC News' Will Gretsky

Russia's security services have arrested an anti-Kremlin political commentator who the jailed Wall Street Journal reporter Evan Gershkovich met with shortly before his own arrest.

Yaroslav Shirshikov has said he spent two days showing Gershkovich around the city of Yekaterinburg during a reporting trip there a couple of weeks before Russia seized Gershovich.

Shirshikov said he had been due to meet with Gershkovich again the week the reporter was arrested in the city.

This morning, local media published video showing masked security officers detaining Shirshikov in his apartment and searching it.

A local news outlet cited a security services representative saying Shirshikov may have been arrested for posting comments cheering the assassinations of two ultra-nationalist pro-war figures, Daria Dugina and the blogger Vladen Tatarsky.

The site UralLive quoted a law enforcement source that Shirshikov was detained on a charge of “justifying terrorism”, which carries a maximum sentence of 7 years prison. It linked the charge to a social media post in which Shirshikov wrote he wasn’t sad over the death of Tatarsky, who was killed in a bomb attack in St. Petersburg this month.

Shirshikov spoke to several international media outlets including ABC following Gershkovich's arrest. He said that Gershkovich had acted entirely as a professional journalist in Yekaterinburg, conducting interviews openly and doing usual reporting.

Shirshikov is a critic of the Russian government and has spoken publicly about his opposition to the war in Ukraine.

-ABC News' Patrick Reevell

Russian President Vladimir Putin made a trip to Kherson and Luhansk, visiting a military headquarters in occupied territory in Ukraine.

Putin arrived via helicopter at the headquarters of an army group in occupied Kherson, according to video released on Tuesday by the Kremlin.

In brief remarks after he arrived, Putin said he didn't want to distract troops from their mission, saying his tour of the installation would be in a "businesslike manner, briefly, but concretely," according to Interfax, a Russian state-affiliated news wire.

"It is important for me to hear your opinion on how the situation is developing, to listen to you, to exchange information," he said, according to Interfax.

-ABC News' Joe Simonetti

Ukrainian Defense Minister Oleksii Reznikov said Friday the military is "ready" to launch a counteroffensive against Russian forces.

"It's up to the general staff and the command," Reznikov said during a press briefing in Kyiv. "We will do it as soon as there is God's will, the weather and the commanders' decision."

Ukraine has received Patriot missile defense systems from the United States as well as Germany and the Netherlands. The Ukrainian military has been trained on how to use the systems and "mastered" them within weeks, according to Reznikov.

"The exact number of batteries, I'm sorry, I won't say," he added. "Let the enemy guess."

Meanwhile, Ukrainian Foreign Minister Dmytro Kuleba urged the world not to consider or call the anticipated counteroffensive "a decisive battle." Speaking at a press conference in Odesa on Friday, Kuleba said the decisive battle is the one that will lead to the liberation of all occupied Ukrainian territories.

-ABC News’ Will Gretsky