MOSCOW - Moscow’s mayor says a bomb blast that killed at least two people and injured 21 others at a restaurant was a “terrorist attack.” An unidentified woman attempted to enter a private event at the Balzi Rossi restaurant on Kudrinskaya Square carrying what authorities believe was an improvised explosive device, state media reported. Moscow mayor Sergei Sobyanin said, “Yesterday, a brutal terrorist attack took place in Moscow, claiming the lives of several people.” The apparent targets were guests attending a private event on the restaurant’s outdoor terrace, Russian business daily Kommersant reported. Investigators believe the bomb was detonated remotely, and a preliminary account indicates that the woman most likely did not know what the package contained, Kommersant reported.