Russian missile used against Ukraine is not hypersonic, defense officials confirm.

On Thursday, two US officials informed Planet Chronicle that the Russian missile launched at Ukraine was not a hypersonic missile.

Putin announced the attack in an address to the nation, stating that it was a direct response to the U.S. and U.K. approving Ukraine's use of Western-supplied long-range missiles to target Russia.

The Kremlin chief claimed that the weapon used in the strike poses a significant challenge for Western nations, while Putin and U.S. sources have confirmed that it was not an intercontinental ballistic missile (ICBM).

During a press briefing on Thursday, Deputy Pentagon press secretary Sabrina Singh announced that Russia had launched an IRBM based on one of its ICBM models. She referred to the missile as "experimental," stating that it was the first time the missile had been used on the battlefield.

Singh expressed concern about the new lethal capability used on the battlefield.

She mentioned that the U.S. was informed briefly before the launch through nuclear or risk reduction channels.

Singh stated that the Department of Defense has not observed any modifications in Russia's nuclear stance, and the U.S. has not made any alterations to its own.

According to a translation, Putin stated that the missile targeted at a speed of Mach 10.

"Putin stated, "The missiles we are developing can travel at 2.5 miles per second, which current air and missile defense systems cannot intercept.""

According to two U.S. defense officials, the missile in question did not meet NASA's definition of hypersonic, which is defined as traveling faster than Mach 5 or 3,000 mph.

The escalation in the war between Russia and Ukraine is that Russia invaded a sovereign border country and sought the help of North Korea to bring about 11,000 soldiers to fight against Ukraine.

After President Biden's change in stance this week, allowing Ukraine to use U.S.-supplied long-range Army Tactical Missile Systems (ATACMS) against the Russian homeland, Kyiv promptly launched attacks on a Russian military arsenal in the Bryansk region, over 70 miles from the Ukrainian border.

Ukrainian troops fired advanced missiles, but the system's accuracy depends on U.S. satellites, which Putin mentioned in his speech on Thursday.

In response to NATO countries' aggressive actions against Russia, we are testing the Oreshnik missile systems in combat conditions. We will decide on the further deployment of intermediate-range and shorter-range missiles based on the actions of the U.S. and its satellites.

Putin declared that Russia would inform Ukrainian citizens of an impending attack, similar to the one carried out on Thursday, although it is uncertain if he gave a warning to Ukrainians residing in Dnipro.

The Ukrainian Ministry of Defense released images showing what appeared to be civilian infrastructure being targeted in the "defense industry," according to the Kremlin chief.

Planet Chronicle Digital’s Caitlin McFall contributed to this report.