Myanmar's opposition National League for Democracy says it is confident of victory in the first openly contested national election in 25 years.
An NLD spokesman said it expected to win about 70% of seats.
Party leader Aung San Suu Kyi said: "I think you all have the idea of the results."
Official results have been released for just 12 seats, all won by the NLD.
The military-backed Union Solidarity Development Party has been in power since 2011.
The acting chairman of the USDP has told BBC Burmese that he has lost his own seat in the constituency of Hinthada to the NLD - seen as a key indicator of election results.