Russia-Ukraine updates: US sanctions Russian military shipbuilder, diamond miner

In the Polish village of Zegrze, about 20 miles north of Warsaw, cars line the small street outside a facility belonging to Poland's Territorial Defense Force (TDF). Officials said interest in training with the TDF has increased sevenfold in the last month, following Russia's invasion of neighboring Ukraine -- creating an unintended traffic backup in the facility's tiny public parking lot.

The TDF is the fifth military branch of the Polish Armed Forces, behind the Land Forces, Army, Navy and Special Forces. The group is made up of volunteer and part-time privates, and is comparable to the National Guard of the United States.

ABC News got exclusive access into the TDF facility in Zegrze and spoke with several new trainees, all of whom were women. Each one spoke about their underlying interest in the military and wanting to feel confident in protecting themselves and their families. But several said they became motivated to enroll after watching average Ukrainian citizens defend their country. They were inspired to be prepared in the same way.

ABC News' cameras were allowed to follow a group of trainees -- men and women of all ages -- as instructors took them into a nearby forest on Tuesday morning. The trainees were clad in army fatigues and their faces were marked with camouflage paint as they crawled along the ground, guns in hand. The training was a grueling, real-life instruction that left them exhausted within an hour.

The program lasts for 16 days, with at least 12 hours of training required each day. At the end, the trainees take a military oath and then are allowed to return home. Many know there is a chance they will soon be called on to help the Polish military as the Russian invasion grinds on in neighboring Ukraine. While they won't likely see combat, their main objective is to enhance national defense capabilities and protect their local communities.

-ABC News' Jeffrey Cook and Mireya Villareal

Ukrainians are attempting to rescue exotic animals from an abandoned zoo near the capital.

Vitaly Mukhanov told ABC News that he had volunteered to help bring supplies to Ukrainian soldiers when he came across the Yasnohorodka family ecopark, about 30 miles outside Kyiv. The park appeared to have been damaged by shelling and the animals, including camels and ostriches, were left with no food. Some were injured, while others were dead.

Videos and images Mukhanov took of the scene and posted on Facebook on Monday quickly went viral and he said he was subsequently contacted by the zoo's owner, who asked if he could help.

In one of the videos, Mukhanov comes across a wounded ostrich. The bird appeared to be taking its last breaths as he gently stroked its head.

"You can see from the images that the animals were in a very bad way," Mukhanov told ABC News. "The town nearby was liberated from the Russians two days ago, so the owner is now returning to the zoo and they hope to evacuate the animals in the next couple of days."

Mukhanov said he has since returned to western Ukraine to get more supplies, but he was told that veterinarians were due to visit the Yasnohorodka family ecopark on Tuesday to provide care to some of the animals.

-ABC News' Fergal Gallagher

A missile hit a temporary Russian military camp near the border with Ukraine late Tuesday, according Russian state-owned news agency TASS.

TASS, citing a source, reported that preliminary data shows the camp, just outside the Russian city of Belgorod, was fired on from the Ukrainian side. However, Ukraine has denied responsibility and instead blamed the incident on Russian error.

Belgorod Oblast Gov. Vyacheslav Gladkov said in a statement that blasts occurred in the village of Krasny Oktyabr, about 19 miles southwest of Belgorod. He did not cite a cause of the incident, saying he was awaiting a report from the Russian Ministry of Defense.

Video circulating online and verified by ABC News shows an explosion in Krasny Oktyabr on Tuesday night. The cause of the blast was unknown.

Ukrainian Deputy Prime Minister Iryna Vereschuk alleged that "an unauthorized detonation of ammunition" took place at a warehouse of the Russian Armed Forces in Belgorod.

"This is an example of typical for Russians neglect of safety precautions and mass use of dangerous ammunition of the Second World War," Vereschuk said at a press briefing Wednesday.

Belgorod is about 50 miles north of the Ukrainian city of Kharkiv, which Russian forces have shelled heavily in recent weeks.

-ABC News' Fergal Gallagher

Air raid sirens sounded off across almost all of Ukraine overnight and into early Wednesday, hours after Russia said it would scale back its military operations around Kyiv and Chernihiv.

Russian forces bombarded the besieged northern Ukrainian city of Chernihiv as well as Khmelnytsky Oblast in western Ukraine, while several missiles were shot down over the capital, Kyiv, according to Vadim Denisenko, an adviser to the Ukrainian interior minister. The damage and any casualties were still being assessed Wednesday morning. Meanwhile, the Luhansk Oblast has been under heavy shelling for days, Denisenko said.

The General Staff of the Armed Forces of Ukraine confirmed Wednesday that the Russian military continues to withdraw part of its troops from near Kyiv and Chernihiv, and are possibly "regrouping units to concentrate the main efforts in the eastern direction." However, the General Staff said it believes the real goals of the so-called withdrawal are a rotation of individual units, misleading Ukraine's military leadership and creating an erroneous idea about Russia's refusal from the plan to encircle Kyiv.

-ABC News' Julia Drozd