Possible terrorist act?
There has been at least two explosions at a compound housing US nationals in Riyadh, the capital of Saudi Arabia. One blast has reportedly occured inside the building, and the building is reportedly on fire right now. This is all the information I could find right now.

One hopes that this was not a terrorist attack, and there is not indictation yet as to what caused the explosions. You have to wonder.. Sigh. Hopefully nobody has been killed.