Russia has previously warned FSA and it Al Q allies that target Russians and they will take quick and direct action using special forces with no rules of engagement.
Given the way they targeted Lebanese kidnappers of Russians in the 1980's its not a message that gets open to misinterpretation. One kidnap of Russians was all that happened in Lebannon, parts of family members of perpetrators suggested a second attempt may get even bloodier, funny that a second kidmapping never happened.