A powerful 7.3 magnitude earthquake struck Nepal on Tuesday - the biggest aftershock to date of a quake which left more than 8,000 people dead less than a month ago.
The latest earthquake has left more than 90 people dead and thousands injured.
Meanwhile, search teams are trying to locate a US military helicopter which went missing during an aid mission with six Marines and two Nepali soldiers on board.
A US Marines helicopter missing in Nepal with eight on board may have come down in a river, the Nepali army has been told.
A senior officer said it had received information that the chopper, which was participating in earthquake relief operations, may have come down in the Charikot area hit hard by an earthquake.
Major Rajan Dahal said 400 soldiers are taking part in the search.
"The info we have is that it is down in one of the rivers, but none of the choppers has seen it yet," he said. "There are 400-plus of our ground troops looking for it also, by this evening, we might get it."
The Marine Corps UH-1Y Huey chopper lost radio contact yesterday after its crew was heard talking about fuel problems.
ITV News has travelled with a helicopter team to rescue a woman in a Nepalese village as the true scale of the latest tragedy emerges.
The birth of Bharat Shrestha's daughter was no ordinary labour - she was delivered during Nepal's second earthquake.