A magnitude 5.6 earthquake struck Mindanao, Philippines, on Saturday, the German Research Centre for Geosciences (GFZ) said.The quake was 10 km (6 miles) deep, GFZ said.The Philippine seismology agency had a different reading, saying it was a magnitude 5.9 earthquake with a depth of 27 km (16.8 miles). The Philippine agency also said in a bulletin it was expecting no damage, but that there could be aftershocks.Rescue workers searching for dozens of missing people in an earlier landslide in Maco town in the southern Philippines province of Davao de Oro had to stop their operations because of the earthquake, authorities said.