A homemade bomb exploded outside a restaurant in central Moscow on Saturday night, killing three people and injuring more than a dozen, Russian officials said. The blast occurred on Kudrinskaya Square when a woman allegedly carrying explosives was stopped by a security guard, according to state media. The woman had reportedly tried to enter the restaurant but was prevented by the guard, and the device detonated at that point. Authorities said the cause of the explosion was under investigation. The venue is located near the center of the Russian capital. Officials did not immediately offer further details about the woman or her motives.