New Delhi, March 20 -- Chief Minister Mamata Banerjee on Thursday wrote another strongly worded letter to Chief Election Commissioner Gyanesh Kumar, expressing "deep shock" at the poll panel's functioning. The letter came hours after the TMC chief attacked the poll panel for 'overnight' transfers of top bureaucrats and IPS officers in poll-bound state.

In the letter, her eighth to the CEC in recent months, Mamata Banerjee alleged that the poll panel had "crossed all boundaries of decency and constitutional propriety".

The chief minister accused the poll panel of acting with "apparent bias" since the commencement of the Special Intensive Revision process and ignoring concerns raised by the state government.

"I am deeply shocked by the f...