Lavrov was not aware of casualties among the Russian military during the U.S. attack on base in Syria April 7, 2017 RR Politics © Alexander Shcherbak/TASS MOSCOW, April 7. /TASS/. Russian foreign Minister Sergei Lavrov said that he knows nothing about casualties among the Russian military as a result of a US strike on an air base in Syria, most likely they were not. Comments comments