Three people, including two children, were killed in a 5.6-magnitude earthquake that struck the eastern Democratic Republic of Congo, the government said Friday. The Kivu region, including the main towns of Goma and Bukavu, trembled from three tremors in the early hours of Friday, according to research institute Goma Volcanological Observatory. At least six people were injured, dpa quoted a government spokesman as saying. The quake was felt across the Great Lakes region, including Lake Kivu and Lake Tanganyika and neighboring Burundi, Rwanda and Uganda. North Kivu governor Julien Kahongya placed the area on alert because of unexplored methane gas reserves in Lake Kivu and the region's eight volcanoes, some of which are active. In 2008, a 5.9-magnitude quake in the Kivu region killed some 30 people and injured more than 350.