The U.S. Embassy said it considered the information about the potential incident "a credible threat" and was coordinating with Russian authorities.

The plant, located in the Russian city of Kamensk-Shakhtinsky, produces solid rocket propellant for the Uragan, Smerch, and Tornado-S multiple-launch rocket systems.

"We're working to strengthen the protection of our people, our bilateral partnership with Turkey, and real diplomatic prospects. There are important issues concerning shipping in the Black Sea," President Volodymyr Zelensky said.

Ukrainian forces downed 105 out of the 134 drones, including jet-powered attack drones, launched by Russia overnight, the Air Force reported. Russian drones struck 20 different locations, and debris fell in 10 areas, according to the statement.

"Don't trust them," Russian Foreign Minister Sergey Lavrov said when asked about the reports.