KHARTOUM, April 20 (Xinhua) -- Sudan's National Elections Commission (NEC) said on Tuesday that it could not define the date to make an official announcement on the final results of the general elections, which were held from April 11 to 15.

"We can not define the date to announce the results because until now we have not received all the results of the elections" from the sub-commissions in the country's 25 states, Abdullah Ahmed Abdullah, vice chairman of the NEC, told Xinhua.

"The elections are complex, which need a longer time to work out the results," the official noted, adding that "before receiving the results from all the states, we can not specify the date."

Meanwhile, NEC member al-Hadi Mohamed Ahmed ruled out any relations between the delay in results announcement and the technical problems in the counting process.

"The process is progressing as planned, and the delay in results announcement does not mean there are technical problems in the counting process," he said.

He expected the ballots counting to complete on Wednesday in all Sudan's northern states.

He further refuted previous reports that the NEC has initially announced the election results in the Blue Nile State, where candidates of the National Congress Party (NCP), Farah Aqar, and the Sudan People's Liberation Movement (SPLM), Malik Aqar, are contesting.

"All what was reported in the daily newspapers on initial results in Blue Nile are not true. The ballot counting is still going on," he said.

The NEC on Tuesday announced the initial results of the elections in a number of Sudanese states, which reflected a clear lead of the ruling NCP.

The general elections, held from April 11 to 15 to select a new president of the republic, a new president of the southern Sudanese government, as well as members of the 450-seat national parliament and 24 governors out of 25 states, are the first multi- party elections in this African country for 24 years.

Sudan's National Elections Commission (NEC) was previously expected to announce the final results on April 20.