The Pakistani police is questioning three local employees at the residence of the Indian High Commissioner Satayabrata Pal in Islamabad and has sent questionnaires to "some Indian citizens" in the mission in connection with a theft at his home last month.

Police sources said they had narrowed their probe to the three Pakistanis and were questioning them though no arrests have been made so far.

The sources said they had also sent questionnaires to "some Indian citizens" in the High Commission and hoped to "get to the bottom" of the theft soon, The News reported on Monday.

The high commissioner's laptop and a briefcase were stolen on the intervening night of November 13 and 14 while he was away in Karachi. Pal's wife too was not in the home at the time of the theft.

The external affairs ministry had sent a team of experts to Islamabad to probe the theft and according to their report the stealing of the laptop and the briefcase are suspected to be the handiwork of two Pakistanis working in the house.

Two of the three Pakistanis who are being questioned by the Pakistani police were employed as gardeners in Pal's home while the third worked as a sweeper.

The theft occurred despite strong security arrangements at Pal's residence, including Pakistani intelligence personnel deployed outside and Indian security personnel posted within the compound.

A team of Indian officials had also visited Islamabad to probe the incident.

Initial reports had suggested that "insiders" were involved in the theft as only the laptop and briefcase were stolen while other valuables were left untouched.