In Turkey 5,894 people are confirmed to have been killed, while 1,932 people have died in Syria for a combined total of 7,826 fatalities.
The death toll could rise by 8 times said WHO as they are finding dead bodies under the rubbel of buildings collapased due to earth quakes in Syria and Turkey.
There are fears that the toll will rise inexorably, with World Health Organization officials estimating up to 25,000 may have died.
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 17.9km (11 miles) near the city of Gaziantep.
Seismologists said the first quake was one of the largest ever recorded in Turkey. Survivors said it took two minutes for the shaking to stop.
