At least 15 people were feared dead in the southern Philippines on Monday after a powerful magnitude 7.8 earthquake struck off the island of Mindanao, injuring more than 100 others and triggering tsunami warnings across several countries. The quake came early in the morning as Philippine schools were reopening after a long break, with the tremors felt strongly in a dozen provinces and 420km (261 miles) away in the city of Manado on the Indonesian island of Sulawesi. Tsunami alerts were issued in...