Three people were killed and 21 injured when an explosive device detonated at an upscale restaurant on Kudrinskaya Square in central Moscow on Saturday night, according to Russia's National Anti-Terrorism Committee. The bomb was carried by a woman, reports said.
Moscow Mayor Sergei Sobyanin called the blast a "brutal terrorist act" and vowed to hunt down those responsible, promising the perpetrators would be punished.
The explosion took place at the restaurant on Kudrinskaya Square, a busy area of the Russian capital. The National Anti-Terrorism Committee confirmed the death toll and injuries late Saturday.
Authorities have not yet released further details about the attack or the woman who carried the bomb. Many questions remain about how the device was brought into the restaurant and whether any group or individual has claimed responsibility.
The attack has shaken Moscow, where security at public venues is strictly enforced. Mayor Sobyanin's statement signaled that the city would take a firm response, though no arrests have been announced so far.
The injured were taken to local hospitals, and their conditions were not immediately known. The investigation is ongoing.