RAWALPINDI, Pakistan (CNN) -- Detectives from Britain's Scotland Yard Saturday examined the scene where former Pakistani Prime Minister Benazir Bhutto was assassinated Dec. 27.
Bhutto sits on stage at a campaign rally minutes before her assassination.
CNN cameraman Phil Littleton said the British counter-terrorism officers spent more than two hours at the public park at Liaqat Bath in Rawalpindi. They also visited the site where Bhutto held a rally just prior to her killing.
The team of five detectives arrived in Pakistan Friday after President Pervez Musharraf agreed they should work alongside Pakistani agencies to determine how Bhutto was killed and who was responsible for her death.
The Pakistan interior ministry say the former leader died when she hit her head on the lever of her car's sunroof after ducking for cover after a suicide bomb attack on her convoy.
However, supporters of Bhutto insist she was shot prior to the explosion -- a view that some say is supported by video footage of the moments before the blast.
In Rawalpindi, police commandos blocked off the road while the British investigators were walked around the scene by Pakistani police, Littleton said.
He said the detectives took photographs and climbed onto a building that overlooked the site of the rally and assassination.
The investigators also spoke with members of Bhutto's Pakistan People's Party (PPP) at a makeshift shrine positioned on the side of the road where the killing took place, he added. They departed the scene under heavy police escort.
Asif Ali Zardari, who has stepped in to lead the PPP, has called for a United Nations inquiry into his late wife's assassination.