Speaking from his home on Friday, Pakistan's former Prime Minister Yusuf Raza Gilani implores the country's intelligence agency to help find his abducted son.

(SOUNDBITE) (English/Urdu) FORMER PAKISTAN PRIME MINISTER, YUSUF RAZA GILANI, SAYING:

"I talked to the director general of ISI, I talked to the army chief and I talked to the president, the caretaker prime minister, the caretaker chief ministers, home minister, interior minister. But I think the best thing would be the ISI. It can be done if they help me."

Gunmen kidnapped Ali Haider Gilani, a candidate for the Pakistan People's Party, as he left an election meeting on Thursday.

His secretary and bodyguard were shot dead in the attack.

No one has claimed responsibility for the kidnapping, just two days before the country goes to the polls.

But a senior police officer on Friday said authorities have some leads.

On Thursday, a letter from the leader of the Pakistani Taliban revealed plans f