ATTOCK, Oct 4: Law-enforcement agencies have arrested four people in Pind Sultani and Domail villages of Jand tehsil for their alleged involvement in the kidnapping of Polish engineer Piotr Stanczak.

Sources said Umar and Ismail of Pind Sultani village and Kamran and Razak Dawood of Domial village were arrested on Monday during two separate raids.

Kamran and Razak were released in the next couple of days.

The two others are being interrogated by a five-member police investigation team.

The sources said that threatening letters to CD/Video shop owners were recovered from them.

Attock’s SP investigation Raja Hasan Akhtar told Dawn that not much headway has been made so far in the investigations.

On a query about the claim of Taliban being involved in the kidnapping, he said he had no official information about the militants’ claims.

Irrespective of the claim of Taliban, the investigation team making hectic efforts to trace the local facilitators as undoubtedly without them, the kidnapers were not able to do such high-profile kidnapping.

It is being assumed that the engineer might have been taken to tribal areas near Kohat, about 25km from the camp of bordering Attock district, the sources said.

Raja Akhtar said the team was interrogating the suspects and previous record-holder criminals by detaining them temporally.

He, however, expressed his ignorance about the recovery of threatening letters from some of detainees.

Meanwhile, some 11 Polish engineers and technicians out of 20 working at the main field camp office Matiyal have left for their country while nine others are busy in their final packing to leave Pakistan within a few days.