Pakistan's former Prime Minister Minister Yusuf Raza Gilani urged restraint, telling his supporters to "let the law take its own course" after his son Hader's abduction.
This is just one more indication of just how violent things have become in Pakistan. Not even the son of a former prime minister was safe.
"My message to the masses is that they should show patience. They should remain patient. Let the law take its own course. Election is a national obligation. They should go out to the polls thinking of it as a national obligation. But our protest is there," he said.
Since April, the al Qaeda-linked Pakistani Taliban have killed more than 100 people in attacks on candidates and at political rallies, particularly those of secular-leaning parties
The polls, already Pakistan's most violent, will mark the first time a civilian government has completed a full term and handed over to another administration.