Investing.com -- Three people were killed and 21 injured after an improvised explosive device detonated at an upscale restaurant in central Moscow on Saturday night, Bloomberg reported, citing Russia's National Anti-Terrorism Committee. Authorities said an unidentified woman attempted to enter the restaurant carrying an explosive device concealed inside a box. The restaurant is located in a prominent area of central Moscow near government buildings, businesses and high-end residential properties. A major security incident in central Moscow could lead to tighter screening at restaurants, hotels, transport facilities and public venues, increasing operating and security costs for businesses. Related articlesBomb kills three and wounds 21 at central Moscow restaurantUkrainian drone strikes kill two in Russia, hit Wildberries warehouseHungarian companies pivot after Orban's allies lose political influence