Former prime minister Benazir Bhutto [Images] has asked the Pakistan government to seek foreign help in probing last week's bomb blasts in Karachi that killed at least 165 people. Moreover, Bhutto's Pakistan People's Party has alleged that there was a deliberate act of sabotage to facilitate the attack.

"We want the government of Pakistan to seek assistance from the international community. They have anti-terrorism expertise to investigate attacks of this nature," Bhutto said while attending a prayer for the victims of the blasts.

Bhutto said she had written a letter to President Pervez Musharraf [Images] before her return to Pakistan citing at least three people who could be involved in the attacks against her. She did not give their names.

Meanwhile, the PPP alleged that streetlights were switched off as a deliberate act of sabotage to facilitate a suicide attack on Bhutto's rally in Karachi and questioned other aspects of the probe into the attack.

Rejecting reports in a section of the media that a security lapse on the part of the police and PPP guards led to the assassination attempt on Bhutto, the party said, "The only reason the bombers succeeded was because the lights had been shut on Shahrae Faisal avenue in Karachi."

In its statement, the party further said, "Consequently the approaching car and bombers could not be spotted and were hidden in the dark".