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

The United Nations' Independent International Commission of Inquiry on Ukraine has released its first in-depth, written report on what it calls "an array of war crimes, violations of human rights and international humanitarian law" committed in the country during the first weeks of Russia's brutal invasion.

The report outlines what investigators say are "documented patterns of summary executions, unlawful confinement, torture, ill-treatment, rape and other sexual violence."

The inquiry zeroed in on four regions of Ukraine-- Kyiv, Chernihiv, Kharkiv and Sumy--and focused on incidents that took place following Russia's invasion on Feb. 24 through the end of March.

Investigators traveled to 27 cities and towns, conducted nearly 200 interviews and "inspected sites of destruction, graves, places of detention and torture, as well as weapon remnants, and consulted a large number of documents and reports."

Due to the sheer number of allegations, the commission could not investigate all the claims it received. The commission said it intends to "gradually devote more of its resources" to a broader investigation within the country, according to the report.

-ABC News' Shannon Crawford

Ukraine will receive anti-drone systems from NATO in the coming days according to NATO Secretary General Jens Stoltenberg.

"The most important thing we can do is deliver on what allies have promised, to step up and deliver even more air defense systems," Stoltenberg said, according to Reuters.

He added, "NATO will in the coming days deliver counter-drone systems to counter the specific threat of drones, including those from Iran."

-ABC News' Will Gretsky

About a third of Ukraine's power stations have been destroyed by Russian attacks in the last week, President Volodymyr Zelensky said on Tuesday.

"Since Oct. 10, 30% of Ukraine's power stations have been destroyed, causing massive blackouts across the country," he said on Twitter. "No space left for negotiations with Putin's regime."

-ABC News' Guy Davies

Thirteen people were killed in a fire after a Russian fighter jet crashed into a residential area in Yeysk, Russia, the TASS news service reported.

"Rescuers have completed clearing the debris," a member of the Emergencies Services told Russia's state-owned news agency. "Ten bodies were found during rescue activities, which brings the total number of deaths to 13 people, including three children. Nineteen people were injured in the emergency situation."

The Su-34 fighter plane crashed during a training flight on Monday night, Russian officials said. The jet's fuel started a fire that engulfed a nine-story residential building in flames, Russia said.

-ABC News' Tanya Stukalova