A massive avalanche on Friday struck Mount Everest killing at least 13 Nepalese Sherpa guides and injuring several others in the deadliest mountaineering accident on the world's highest peak.

Nepal's Unified Communist Party of Nepal-Maoist on Thursday demanded a suspension of the vote counting, alleging conspiracy after initial results showed the party trailing at third position in the constituent assembly elections.

Nearly 70 per cent of Nepal's electorate voted on Tuesday to choose an assembly that will draft a new constitution to end years of turmoil and political uncertainty though balloting was hit by sporadic violence, including vandalism and explosions that injured a dozen.