People walk by the earthquake damaged Durbar Square in Katmandu. Hundreds of thousands of Nepalis spent another night in the open after a massive quake which killed more than 4,000, as officials warned the final toll could rise sharply once rescuers reach cut-off areas.

People walk by the earthquake damaged Durbar Square in Katmandu.

A man stands outside a bus as his family leaves for a safer place after Saturday's earthquake, at a bus terminal in Kathmandu.

People walk by the earthquake damaged Durbar Square in Katmandu.

Damaged houses are seen from an Indian Army helicopter following an earthquake in the Nepalese area of Gorkha. Hungry and desperate Nepalese villagers rushed towards a relief helicopter begging to be airlifted to safety.

People search through the rubble at the earthquake damaged Durbar Square in Kathmandu.

Nepalese army personnel search through the rubble at the earthquake damaged Durbar Square in Kathmandu.

The Mount Everest south base camp in Nepal is seen a day after a huge earthquake-caused avalanche killed at least 17 people.

People search through the rubble at the earthquake damaged Durbar Square in Kathmandu.

This general view shows a destroyed building in Khokana some 10kms south of Kathmandu after an earthquake devasted the Kathmandu Valley on April 25.

Rescuers in Nepal are battling to reach remote communities devastated by a huge earthquake that has killed at least 4,310 people, as the impoverished country's leader said relief workers had still not reached many of the worst-hit areas.

People sleep on the ground in an open area on early morning after an earthquake in Kathmandu, Nepal.

Villagers walk past a damaged house where three were killed by the earthquake at Jharibar Village, in Gorkha, Nepal.

Nepalese soldiers stack bags of grain at a relief staging area near Saturday's massive earthquake's epicenter in the town of Gorkha, Nepal.

Prabina Mainali, feeds her newly born baby boy - not even a day old - in a make-shift tent situated in open ground from fear of earthquake tremors, in Kathmandu, Nepal.

Nepalese soldiers load U.S. AID relief sacks at landing zone near Saturday's massive earthquake's epicenter in the town of Gorkha, Nepal.

A helicopter carrying supplies and officials lands at a relief staging area near Saturday's massive earthquake's epicenter in the town of Gorkha, Nepal.

Villagers feed livestock next to a relief tent after a 7.9-magnitude earthquake hit Nepal on Saturday, in Nyalam county, Tibet Autonomous Region, China.

Nepalese victims of a recent earthquake dig a small drain to prevent rain water from entering their makeshift tent, in Kathmandu, Nepal.

A resident walks past damaged buildings at a village following Saturday's earthquake in Sindhupalchowk, Nepal.

View of the debris of collapsed Bhaktapur Durbar Square after Saturday's earthquake, in Bhaktapur, Nepal.

People attend a funeral service during the cremation of a victim of Saturday's earthquake at the Pashupatinath temple on the banks of the Bagmati River in Kathmandu, Nepal.

Cremation ground workers stack up wooden logs to be used later to cremate victims of Saturday's earthquake, at the Pashupatinath temple on the banks of Bagmati river in Kathmandu, Nepal.

A cremation ground worker carries a bundle of hay to be used later to cremate victims of Saturday's earthquake, at the Pashupatinath temple on the banks of Bagmati river in Kathmandu, Nepal.

A Sri Lankan student, who returned from Kathmandu after Saturday’s massive earthquake, joins hands as a gesture of praying as she along with others arrives at an Air Force base in Katunayake, on the outskirts of Colombo, Sri Lanka.

SGPC Team loading relief materials on a truck for Nepal earthquake victims, in Amritsar

A Sri Lankan student, who returned from Kathmandu after Saturday’s massive earthquake, cries after her arrival at the Air Force base in Katunayake, on the outskirts of Colombo, Sri Lanka.

An injured boy cries in pain as he is carried by Nepal Army personnel to a helicopter following Saturday's earthquake in Sindhupalchowk, Nepal.

Residents try to salvage their belongings from the debris of their house at a village following Saturday's earthquake in Sindhupalchowk, Nepal.

Marigold flowers, commonly used in Hindu rituals, lie strewn on the ground after the cremation of a victim of Saturday's earthquake at the Pashupatinath temple on the banks of Bagmati river in Kathmandu, Nepal.

Nepalese take their belongings and leave their home to move to a safer area in Kathmandu, Nepal.

A cremation ground worker pours water to cool the ash after the cremation of a victim of Saturday's earthquake, at the Pashupatinath temple on the banks of Bagmati river in Kathmandu, Nepal.

A car moves past damaged buildings at a village following Saturday's earthquake in Sindhupalchowk, Nepal.

Residents walk past damaged buildings at a village following Saturday's earthquake in Sindhupalchowk, Nepal.

A resident clears the rubble from her collapsed house at a village following Saturday's earthquake in Sindhupalchowk, Nepal.

A woman ties up belongings retrieved from the ruins of her home after Saturday's earthquake in Bhaktapur, Nepal.

A Nepalese woman victim of an earthquake peeps from her makeshift tent in Kathmandu.

A car is seen covered under debris at a village following Saturday's earthquake in Sindhupalchowk, Nepal.

Local villagers gather around a camp fire to make them warm, following Saturday's earthquake, at Paslang village in Gorkha, Nepal.

A local villager holds an umbrella as he walks amid debris at a devastated area following Saturday's earthquake, at Paslang village in Gorkha, Nepal.

Earthquake victims stay inside Gorkha hospital in Gorkha, Nepal.

A devastated area is pictured following Saturday's earthquake, at Paslang village in Gorkha, Nepal.

Damaged houses are seen from an Indian Army helicopter following an earthquake in the Nepalese area of Gorkha.

Injured residents sit inside a tent at a relief camp following Saturday's earthquake in Sindhupalchowk, Nepal.