The death toll from a strong earthquake in south-eastern Turkey, near Syria’s border, could rise eight-fold, the World Health Organisation has warned. The toll, which currently stands at more than 3,400 people, has increased rapidly since the first earthquake struck early on Monday morning. About 12 hours later, a second powerful tremor hit further north. Rescuers have been combing through mountains of rubble in freezing and snowy conditions to find survivors. Countries around the world are sending support to help the rescue efforts, including specialist teams, sniffer dogs and equipment. The US Geological Survey said the 7.8 magnitude tremor struck at 04:17 local time (01:17 GMT) at a depth of