On 10 January 1978, the editor of the Managua newspaper "La Prensa", and founder of the Union for Democratic Liberation (UDEL), Pedro Joaquín Chamorro Cardenal was murdered by suspected elements of the Somoza regime, and riots broke out in the capital city, Managua, targeting the Somoza regime. Following the riots, a general strike on 23–24 January called for the end of the Somoza regime and was, according to the U.S. State Department staff at the U.S. Embassy, successful at shutting down around 80% of businesses in not only Managua but also the provincial capitals of León, Granada, Chinandega, and Matagalpa.