Russian defense ministry said on Saturday its air defense forces shot down four US-produced long-range missiles over the Crimea peninsular, weapons known as Army Tactical Missile Systems (ATACMS) that Washington has shipped to Ukraine in recent weeks.
The ministry did not give details.
On Tuesday, Russian officials also said Ukraine had attacked Crimea with ATACMS in an attempt to pierce Russian air defenses of the annexed peninsula but that six had been shot down.
A US official said in Washington last month that the United States secretly shipped long-range missiles to Ukraine in recent weeks.
The ATACMS missiles, with a range up to 300 km (190 miles)were used for the first time in the early hours of April 17, launched against a Russian airfield in Crimea that was about 165 km (103 miles) from the Ukrainian front lines, the official said.