While Ukraine has rarely reported on its combat losses since the Russian invasion began in late February, President Volodymyr Zelenskyy announced during a press briefing Sunday that 50 to 100 Ukrainian soldiers are being killed every day.

The last time Zelenskyy revealed military death toll figures was in April, when he said that around 3,000 Ukrainian soldiers had been killed in action and around 10,000 wounded. Zelenskyy did not provide a total figure for combatants killed in action on Sunday.

Since the start of the invasion, most Ukrainian men ages 18 to 60 have been banned from leaving the country. On Friday, a petition calling for the government to cancel the ban was registered with the president’s office.

The petition surpassed the 25,000-signature threshold that requires the president to address it on Sunday. Zelenskyy acknowledged the petition during Sunday's briefing.

"How would I explain that to relatives of our defenders who are fighting at the most difficult positions in the East, where 50 to 100 troops lose their lives every day?"

Ukraines parliament voted to extend martial law through Aug. 23. Zelenskyy’s office has a few weeks to consider the petition.

-ABC News' Christine Theodorou

Ukrainian President Volodymyr Zelenskyy extended a warm welcome to Polish President Andrzej Duda on Sunday amid his bid to have his country join the European Union.

During a parliamentary session, Zelenskyy expressed his gratitude to all Poles for their support, making it clear that pushing full steam ahead to ensure Ukraine is granted candidate status.

"I am sure that all the necessary decisions will be made first for the status of a candidate for Ukraine, and then for full membership," he said. "In particular, thanks to Poland's many years of protection of Ukrainian interests on the European continent."

Shortly after Zelenskyy and Duda addressed lawmakers, the parliament session was briefly interrupted when air sirens sounded in Kyiv, and members of parliament were moved to a shelter. The Ukrainian regional military administration later confirmed a Russian missile was intercepted over the Kyiv region.

France's Minister for European Affairs Clément Beaune in his interview with France TF1 radio said on Sunday that it could take 15 to 20 years for Ukraine to become an EU member state, adding that Kyiv could enter the European political community proposed by French President Emmanuel Macron in the meantime.

-ABC News' Christine Theodorou

The Russian Defense Ministry provided updates to what it described as the “special military operation in Ukraine” on Sunday, saying that hundreds of Ukrainians were killed in recent attacks.

High-precision air missiles and other attacks launched in Donetsk, Lugansk and Krasnyi on Sunday hit command posts, areas where Ukrainian manpower and military equipment are concentrated and ammunition depots, according to the Russian Defense Ministry.

The attacks killed more than 210 Ukrainian nationals and destroyed as many as 38 armored motor vehicles, the ministry claimed.

Russian air defense also shot down 11 Ukrainian aircraft and intercepted “multiple launch rockets” in the Kharkov region, according to the defense ministry.

The ministry claimed that, in total, 174 Ukrainian aircraft and 125 helicopters, 977 unmanned aerial vehicles, 317 anti-aircraft missile systems, 3,198 tanks and other armored combat vehicles, 408 multiple launch rocket systems, 1,622 field artillery and mortars and 3,077 units of special military vehicles were destroyed during the operation.

President Biden signed the $40 billion Ukraine aid bill into law Saturday, the White House announced in a press release.

The bill provides supplemental emergency funds to Federal agencies to respond and provide assistance to Ukraine.

Ukrainian President Volodymyr Zelenskyy thanked Biden on Twitter for the aid.

"The leadership of US, President Biden & the American people in supporting Ukrainians fight against the Russian aggressor is crucial. Look forward to new, powerful defense assistance. Today it is needed more than ever," Zelenskyy said.

-ABC News' Molly Nagle and Max Uzol