KARACHI: Pakistan Tehreek-i-Insaf (PTI) chairman Imran Khan on Monday said people who were willing to testify against rigging in the 2013 general elections can only be provided proper protection if Nawaz Sharif resigns.

The PTI supremo said on micro-blogging website Twitter that without Nawaz's resignation it wouldn't be possible to accord the protection to those who are willing to come forward and testify.

Imran said the latest statement from Muhammad Afzal Khan, the former additional secretary of the country's election commission, alleging that the people’s mandate had been stolen and massive rigging was done in the elections, indicated that the mystery of the state of last year's elections was now unravelling.

Imran further said that people were now willing to step forward and speak against the rigging, adding that those who testify in this regard should be provided security.

Former additional secretary ECP Afzal Khan late on Sunday alleged that ex-chief justices Iftikhar Chaudhry and Tassadduq Jillani were involved in rigging the vote.