The website dedicated to providing overseas Pakistanis with a right of internet voting sustained multiple cyber-attacks, official told Daily Mail.
Voting for the by-election on 35 national and provincial assemblies commenced was held on October 14.
According to official, the i-voting website sustained 10,000 cyber-attacks simultaneously. NADRA authorities were, however, able to thwart the attack and the website from going down.
The website did not go down even once in seven hours, official added.
The Election Commission of Pakistan (ECP) Director General IT Muhammad Khizar Aziz told Daily Mail that the website had been loading slowly due to a lot of traffic and that that is usual in the case.
The ECP website is working properly, he said.
