A United Nations inquiry into the assassination of former Pakistan prime minister Benazir Bhutto begins on Wednesday.
It is headed by Chile's ambassador to the UN, Heraldo Munoz, and includes a former Indonesian attorney general and a former senior Irish police officer.
The inquiry will last six months and investigate the "facts and circumstances" of Ms Bhutto's death, the BBC reports.
Ms Bhutto was killed in December 2007 as she left a rally of her Pakistan People's Party supporters in Rawalpindi.
The three-member inquiry team will arrive in Pakistan later in July and submit its report to the UN Secretary General in six months, reports say.
Apart from Mr Munoz, the other members of the probe team are Marzuki Darusman, the former Indonesian attorney-general, and Peter Fitzgerald, who headed an early inquiry into the assassination of former Lebanese prime minister Rafik Hariri.
Pakistan's Interior Minister Rehman Malik told the BBC his government thought the UN investigation was necessary to find out who was behind the attack.
"We want to know who was behind this, who had conspired it, who has financed it. And we think this was a big international conspiracy," he said.
"Obviously, there might be some actors within Pakistan or within the region, but we want really to expose the whole conspiracy, because we think that this was a kind of a beginning of an attempt to Balkanise Pakistan."
These are challenging times in Pakistan to carry out such an investigation, the BBC reports.
That is not least because the Pakistan Taliban leader Baitullah Mehsud, accused by the last government here of being behind the assassination, is the target of a two-month military offensive and his militant network has hit back with retaliatory suicide attacks.
The Taliban commander has denied having anything to do with Ms Bhutto's killing.
