Eight people were killed and dozens injured when a series of earthquakes struck islands in the far northern Philippines early Saturday, toppling historic buildings and sending terrified locals fleeing their homes.The tremors hit the province of Batanes, a group of sparsely populated islets north of the nation's largest Luzon island, tearing deep cracks in roads and forcing the evacuation of a hospital.Authorities said some of the dead, including two babies under a year old, were crushed