Pakistani police have released a photograph of a suspected suicide bomber involved in the killing of at least 139 people during the homecoming procession of former Pakistani Prime Minister Benazir Bhutto on Thursday.
Pakistani media outlets showed pictures of the severed head of an unidentified man police say may be responsible for the deadly bomb attacks targeting Ms. Bhutto's motorcade in Karachi. Authorities say they are investigating a list of other possible suspects as well.
Angry Bhutto supporters burned tires and threw rocks at passing cars in several Karachi neighborhoods Saturday to protest the attacks.
Ms. Bhutto has said she knew she was a target for assassination when she returned home to Karachi, but that she decided not to allow such threats to change her plans.
She told reporters Friday that a foreign government had informed her that four assassination teams, including suicide squads from the Taliban and al-Qaida, were planning attacks against her.
While mourning the casualties, the former prime minister said she cannot let such attacks set back her political efforts in Pakistan.
A top Taliban commander has denied any involvement in Thursday's carnage, and no other group has claimed responsibility for the attack, which has been strongly condemned around the world. President Pervez Musharraf also has denounced the attack, and he promised a thorough investigation.
Pakistani Interior Minister Aftab Sherpao says officials urged Ms. Bhutto not to drive through Karachi's clogged streets, for security reasons, and advised her to fly into the center of the southern port city by helicopter. Sherpao said the leadership of Ms. Bhutto's Pakistan People's Party refused to agree to a flight, so they bear some responsibility for the attack.
Some information for this report was provided by AFP, AP and Reuters.