Musa Gilani on his brother's Ali Haider's kidnapping
9 May 2013 Last updated at 12:30 BST
Pakistan's former Prime Minister Yousuf Raza Gilani says his son has been kidnapped by unidentified gunmen during an election rally in the central city of Multan.
No group has so far claimed responsibility for the attack.
Musa Gilani, the brother of Ali Haider - who is a candidate for the Pakistan Peoples' Party - said that "If we don't get my brother Haider Gilani by this evening, I will not let the election happen in my area".