U.S. officials said it was an intermediate-range ballistic missile.
LONDON and KYIV -- Russia on Thursday launched what officials in Kyiv said was an intercontinental ballistic missile toward southeastern Ukraine, but a U.S. official told ABC News that Russia launched "an experimental medium-range ballistic missile against Ukraine" near Dnipro.
The official said the United States briefed Ukraine and other close allies and partners in recent days on Russia's possible use of this weapon in order to help them prepare. According to the official, Russia likely only possesses "a handful" of these experimental missiles.
Two U.S. officials previously told ABC News it was not an ICBM but instead an intermediate-range ballistic missile, or IRBM.
Russian President Vladimir Putin, in remarks Thursday following the missile launch, said Russia has the right to use its weapons against the military facilities of countries employing their weapons against Russia.
"We consider ourselves entitled to use our weapons against military objects of those countries that allow to use their own weapons against our objects. In the event of an escalation of aggressive actions, we will respond decisively and in a mirror manner," Putin said.
Putin said Russia used "one of the newest Russian medium-range missile systems" in an attack on Ukraine, adding that it was a "ballistic missile with a non-nuclear hypersonic equipment" and that the "test was successful."
The Kremlin announced earlier this week that Putin had updated the country's nuclear doctrine, a move that lowered the bar for Russia to respond with nuclear weapons. Russian ICBMs are capable of carrying nuclear warheads, although it appeared the missile fired on Thursday was not equipped with one.
Ukraine's military was "95% sure" the strike on Thursday was with an ICBM, a Ukrainian official told ABC News, but added that they were still examining the missile parts on the ground and had not yet reached a final conclusion.
"Today it was a new Russian missile. All the parameters: speed, altitude -- match those of an intercontinental ballistic missile," Ukrainian President Volodymyr Zelenskyy said in a statement on social media. "All expert evaluations are underway."
The Ukrainian Air Force announced Thursday morning it had tracked the launch of the ICBM, along with six additional missiles, all of which were targeting the Dnipro region. The ICBM appeared to have been launched from the Astrahan region, in Russia's southwest, Ukrainian military officials said.
All of the missiles were launched in about two hours, beginning at about 5 a.m. local time, Ukraine said.
All were targeted at businesses and critical infrastructure, but only the missile that Ukraine identified as an ICBM struck the city, Ukraine said. The six other missiles were shot down. There were no reports of casualties or significant damage, officials said.