I dont think they will wait until AFTER the Olympics. Unless things have changed you can expect and immediate and serious response.
I recall cold war stories where some moron group kidnapped a russian to coerce them the way they were doing in other countries, and Russia tossed some of their in-country friends right into a blast furnace (alive). Not a peep out of them after.
@ Post 7 - you are right. The Russian response to this will likely be far more harsh than anything we imagine in the West.
Saudi Arabia is playing with fire.