Two earthquakes hit eastern Afghanistan on Friday, killing at least 15 people and destroying dozens of houses, a government spokesperson said. Ahmad Zia Abdulzai said the tremors, which occurred about 90 km east of Kabul, have killed 15 people, injured 20 and destroyed about 100 houses. The two earthquakes, of 5.5 and 5.1 magnitude, hit eastern Afghanistan in the early hours of Friday, the US Geological Survey reported. One quake of 5.5 magnitude rattled the Hindu Kush border area between Afghanistan and Pakistan at 1.57 a.m. (GMT2127) at a depth of eight km and was followed by another other one of 5.1 magnitude at a depth of three km two hours later, the website said. People in Afghan capital Kabul felt the tremors while casualties were feared in eastern Afghan province of Nangarhar. The Hindu Kush range which covers northern and eastern Afghanistan are often jolted by earthquakes.