In a swift action, the West Bengal government on Wednesday apppointed senior police officer Gautam Mohan Chakraborty as the new Kolkata police commissioner in place of Prasun Mukherjee who was transferred with immediate effect in connection with the death of Rizwanur Rehman.

West Bengal Home Secretary P R Roy told reporters in Kolkata that Chakraborty, additional director general of police (Telecom) would take over his new assignment soon.

New deputy commissioners for headquarters and the detective department were also named by the home secretary to replace Gyanwant Singh and Ajay Kumar.

Chief Minister Buddhadeb Bhattacharya earlier in the day announced the transfer of Mukherjee, two deputy commissioners, an assistant commissioner and a sub-inspector for alleged involvement in the unnatural death of computer graphic teacher Rizwanur Rehman who married the daughter of a Hindu industrialist.