Islamabad, Dec 31: Investigators probing into former Prime Minister Benazir Bhutto’s assassination are facing problems in collecting forensic evidence, as Rawalpindi Police had washed the crime scene on the very first day of the incident.

Sources in the investigation team headed by Additional Inspector General of Police Abdul Majeed said that a premier intelligence agency was not passing them information about the identity of suicide bombers received from the National Database and Registration Authority (NADRA).

The team is also being denied access to the forensic information collected by the agency.

Meanwhile, Deputy Inspector General of Police, Rawalpindi Range, Saud Aziz said that the crime scene was washed after collection of forensic evidence.

"We are facing severe problems in collecting forensic evidence, as the crime scene has been thoroughly washed," an investigator said.

Police and security sources said the investigators were convinced that in addition to the shooter and suicide bomber, there was a third person who was monitoring the execution of the plan.

Investigators couldn’t find any fingerprints on the two 30 caliber pistols recovered from the crime scene that was covered in splashes of water.

The Daily Times quoted an expert as saying that fingerprints on metal could not survive in water. A casing of a bullet was also recovered from the crime scene, while casings of other two bullets fired at Bhutto could not be located.

Investigators are yet to find out from which pistol the bullets were fired at Bhutto.