ISLAMABAD, Pakistan (CNN) -- Rescue workers pulled survivors from rubble and uncovered bodies from debris as darkness fell in Islamabad and elsewhere, a day after a 7.6-magnitude earthquake caused devastation across South Asia.
Nearly 20,000 people were estimated killed in Pakistan, India and Afghanistan as a result of Saturday's quake.
The death toll is expected to rise once remote areas of Pakistani-controlled Kashmir and the country's North-West Province are reached. Communication to many of those areas was cut off because of the temblor, and landslides had rendered roads inaccessible.
Pakistani President Gen. Pervez Musharraf issued a plea on Sunday for foreign aid -- specifically, cargo helicopters and relief goods such as tents and blankets.