Air raid sirens went off across Ukraine around 5 a.m. local time Tuesday.

Air defense systems were activated in the Kyiv region.

The Russian airstrike on Kyiv was the "fifth air attack" on the capital since the beginning of May, the Kyiv City Military Administration said on Telegram.

About 15 Russian missiles were launched at Kyiv and intercepted by the Ukrainian air defenses around Kyiv with "no casualties and major damage," the city military administration added.-ABC News' Yulia Drozd and Yuriy Zaliznyak

Four people were injured from falling debris after a Russian drone was shot down above Kyiv, Mayor Vitali Klitschko said on Telegram.

Three of the people injured were at the site of the explosion in Solomyanskyi district of Kyiv, and one was in the Svyatoshynskyi district of Kyiv, where wreckage fell on a residential building, the mayor added.

Debris also fell on runway at the Zhulyany airport in the Solomyansky district of Kyiv, the head of the Kyiv City Military Administration Serhiy Popko said on Telegram.

In Odesa, Russian troops launched a missile attack from strategic aircraft, Ukrainian Operational Command South said on Facebook. The X-22-type rockets used by the Russians were "aimed at one of the food companies and recreational zones on the Black Sea coast," the Operational Command South said.

Rescue services are working to put fires out, and no information about the number of people injured was immediately available, they added.

-ABC News' Max Uzol and Natalia Kushniir

Air alert sirens went off in several regions of Ukraine late Sunday evening as Russian forces launched a widespread airstrike on the country.

Air alert sirens went off in central and southeastern Ukraine, including in the Odesa, Kyiv, Zaporizhia, Dnipropetrovsk, Kherson and Mykolaiv regions of Ukraine.

Kh-22 missiles were launched toward Odesa, unofficial Telegram channels reported. The air defense systems were activated in response to the attack and repeated explosions were heard in the area, unofficial channels reported.

-ABC News' Max Uzol and Anastasia Bagaeva

The leader of of Russia's Wagner mercenary group appeared on Sunday to ditch plans to withdraw his forces from Bakhmut in eastern Ukraine after receiving promises overnight that they would get all the arms needed to capture the devastated city.

Yevgeny Prigozhin said in a new audio message that the Kremlin has promised to resupply his Wagner Private Military Company with as much ammunition and weapons as they need.

Prigozhin said that for the first time he received a response to the situation regarding the shortage of ammunition. He said on Saturday night that the relevant companies promised to deliver everything necessary to continue the offensive in Bakhmut.

"Overnight we received a combat order, for the first time in all this time," Prigozhin said. "We have been promised as much ammunition and weapons as we need to continue further operations. We have been promised that everything needed to prevent the enemy from cutting us off (from supplies) will be deployed on the flank," he added.

In addition, Russian Army Gen. Sergei Surovikin will personally deal with issues of interaction between the Wagner PMC and the Ministry of Defense, Prigozhin said. "This is the only man with the star of an army general who knows how to fight," Prigozhin said of the Russian Defense Ministry assigning Surovikin to work alongside Wagner.

Surovikin commanded Russia's Ukraine campaign for several months before the chief of the General Staff, Army Gen. Valery Gerasimov, was given overall operational command above him.