The CID today arrested four persons in connection with the theft at Jessop factory in Dumdum area, where a fire broke out on Monday evening.
Sumit Bhattacharya (33), a resident of Madhyamgram, Palan Adhikary (27), Chottu Roy (18) and Prasanta Mandal (27) were arrested in connection with the theft cases.
According to the CID official, five other persons were also detained because of their alleged involvement in arson at the factory premises.
"We are trying to find out what has been happening there, and where the materials were taken and who took them," the official said.
Fire broke out in the painting department of the vacant factory on Monday evening, the third time in two weeks.
Former workers alleged that the fire was part of a conspiracy by a third party following which the West Bengal government ordered a CID probe into the mishap.
Incidentally, the state has also registered a complaint against Jessop owner Pawan Ruia at Dumdum police station.
Reacting to the complaint, a company spokesperson said, "(Pawan) Ruia is not the chairman. He is neither the director or a shareholder, or an occupier of Jessop and Co Ltd or of any of its premises...