KATHMANDU, April 28 -- The death toll in Nepal's massive quake could jump to 10,000, Nepalese Prime Minister Sushil Koirala told ambassadors of China, India and the United Stateson Tuesday.

Some 4,355 people were already confirmed dead and 8,065 other injured, while hundreds were still missing across the Himalayan country following Saturday's 7.9-magnitude earthquake, according to the Home Ministry.

Koirala's media advisor Prakash Adhikari told reporters that Nepal was seeking more and quicker international aid to provide both immediate assistance to the quake victims and to rebuild the economy.