Two people have been arrested by police investigating the assassination of opposition leader Benazir Bhutto in Pakistan.
A senior security official said 'two very important alleged terrorists, Hasnain and Rafaqat, from Rawalpindi' had been arrested.
Pakistani officials have described the arrests as a major breakthrough.
Ms Bhutto died in a gun and suicide bomb attack in Rawalpindi on 27 December. Her murder sparked days of rioting in Pakistan and forced the postponement of the general elections.
The arrests come as a Scotland Yard team invited by President Pervez Musharraf to assist Pakistani investigators returned to Islamabad. It is due to present its report tomorrow.
The government said the British investigators' task was to give their opinion on the cause of Ms Bhutto's death.
Initially the government said the two-time premier died from a fatal blow to the skull when she hit the lever of a sunroof while ducking into her vehicle to avoid the suicide blast at an election rally.
But her party and media reports said she died of wounds from bullets fired by an assassin as she stood waving to party workers.
Mr Musharraf later admitted that it was possible Ms Bhutto might have been shot dead.
Ms Butto's Pakistan People's Party has demanded a UN probe into her death but the government has rejected this.
Tens of thousands of Bhutto supporters today gathered outside her tomb in southern Pakistan to mark the end of the official 40-day mourning period.
