
Social media posts on Friday said air-defense systems have been installed in several spots in Moscow, including atop the Russian Defense Ministry headquarters.
Russian officials have not commented on the reports of weaponry resembling a Pantsir-S1 mobile anti-aircraft system spotted on the roofs of a building in central Moscow about 2 kilometers (1.2 miles) east of the Kremlin and of the Defense Ministry, which looms along the Moscow River across from Gorky Park.