At least 13 people were killed and 100 others injured after a 6.7 magnitude earthquake hit Philippines' Surigao city, officials said on Saturday.Surigao Governor Sol Matugas said the quake struck late Friday night, 14 km northwest of the city, Xinhua news agency reported.The government disaster agency in Manila has yet to issue official data of damage or casualty.Matugas said that the earthquake caused power outages in the city, destroyed the airport runway, bridges and buildings, including hotels and schools.Tremors were felt in neighbouring provinces of Leyte, Mandate City, Butuan, Tacloban and Cebu.The agency has recorded at least 89 aftershocks after Friday's quake.Meanwhile, city residents posted images on social media of the damages after the quake.A Surigao-based television station posted pictures of a two-storey house with collapsed walls.Hundreds of residents fled their homes and spent the night outside, according to local authorities.