COTONOU, Benin—Attacks by suspected Islamic extremists in northern Benin have killed at least eight people, including army soldiers, park rangers and a French instructor, the government has confirmed. Six people were killed and a dozen injured in an ambush Tuesday which included explosions from improvised land mines on a patrol of park rangers in the north of the W National Park near the borders of neighboring Burkina Faso and Niger, Benin government spokesman Wilfried Leandre Houngbedji said. Five rangers and their French instructor were killed in that attack, he said. The rangers were part of an anti-poaching patrol working with African Parks, an international organization that manages several parks on the continent including the W National Park. The W park is shaped like the letter in the alphabet as it follows the bends in the Niger River as it straddles Benin, Niger and Burkina Faso. Reinforcements from the Benin Armed …