LONDON (Reuters) - Russia struck and disabled Ukraine's Starokostiantyniv military air base with long-range high-precision weapons, Russia's defence ministry said on Sunday.

       "The Russia armed forces continue to strike the military infrastructure of Ukraine," Russian defence ministry spokesman Igor Konashenkov said.

       "On the morning of March 6, strikes were carried out by high-precision long-range weapons. The Ukrainian air force base near Starokostiantyniv was disabled."

       He said a Ukrainian-controlled S-300 missile system had also been destroyed by Russian rocket forces. He said Russia had downed 10 Ukrainian planes and helicopters over the past 24 hours.

       (Reporting by Guy Faulconbridge;Editing by Elaine Hardcastle)