US President Joe Biden said on Wednesday that it was improbable that the missile that killed two people in NATO ally Poland was fired from Russia. However, he vowed to help Poland to find the truth about the fatal incident.

Joe Biden made the remarks after he had met with G7 and NATO leaders in Indonesia on Wednesday morning to discuss the Poland Missile Strike in the eastern part of the country, close to the country's border with Ukraine.

AP News reported that the POTUS told reporters that preliminary intelligence suggests the incident was not a Russia Missile strike. He noted: "It is unlikely in the lines of the trajectory that it was fired from Russia, but we'll see."

During a devastating barrage against Ukraine's electrical infrastructure on Tuesday, Ukrainian soldiers reportedly launched a missile at an approaching Russian missile, according to three US officials. The sources spoke anonymously because they weren't allowed to discuss the situation.

Ukraine still has a supply of weapons from the Soviet Union and Russia, notably the S-300 anti-aircraft missile system.

Pres. Joe Biden, who was in Indonesia for the Group of 20 meetings when he learned of the Poland Missile Strike, contacted Polish President Andrzej Duda early Wednesday to express his "deep condolences."

Biden updated the allies on his meetings with Duda and NATO Secretary General Jens Stoltenberg and said there was "Total unanimity" to support Poland's blast inquiry.

President Joe Biden has promised to investigate the incident thoroughly. He noted that once they have gathered all the pertinent information from the probe, the group will decide the next course of action.

Ukraine Reacts on Initial Findings

Meanwhile, Ukraine's military ministry said the subject was "extremely delicate" as new facts emerged about the incident involving a missile that reached Poland and killed two people.

This was in response to the remarks of the three anonymous US officials who claimed that the missile that hit Poland was fired by Ukrainian forces toward an oncoming Russian missile.

As investigations progressed and NATO prepared for an emergency session in Brussels on Wednesday, Ukraine's government remained reluctant to comment on the initial findings in the Poland Missile Strike probe.

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Russia unleashed its largest round of missile assaults on Ukrainian towns in more than a month on Tuesday afternoon, around the time the missile fell outside the rural Polish village of Przewodow, some four miles (6.4 kilometers) west of the Ukrainian border, as per a CNN report.

Moscow, Kyiv Both Use Russian-made Weapons in the War

There is still little information available on the event, which represents the first direct hit on a NATO country in the almost nine-month battle, while the Polish Foreign Ministry has classified the missile as "Russian-made."

Russian and Ukrainian forces employed Russian-made ammunition during the war, and Ukraine deployed Russian-made rockets as part of its air defense system in the Russia-Ukraine war.

This older weaponry dates back to when Russia and Ukraine were in the Soviet Union.

Yuriy Sak, an aide to Ukraine's Defense Minister Oleksiy Reznikov, told CNBC the event was "very sensitive" and it is "too early" to provide "definitive" remarks.

On Wednesday morning, Sak underscored that "it's very dangerous to jump to any conclusions" as the Polish government said, "there is no conclusive evidence of what exactly has happened."

The Ukrainian official added that US President Joe Bide "was also cautious because everybody understands that this is a very sensitive issue."

He underscored that an investigation must be conducted before making any judgment.

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