Chandra was appointed as an election commissioner on February 14, 2019 ahead of the Lok Sabha elections. He would demit office on May 14, 2022.
Four persons died on Saturday when CISF personnel opened fire allegedly after coming under attack from locals, who 'attempted to snatch their rifles', the police had said.
Mamata Banerjee had said that she will hold a protest rally in Cooch Behar on Sunday against the firing incident and visit the homes of the deceased.
Police registered a case under the Explosive Substances Act and Arms Act. Further investigation is underway.
The letter pointed out instances of star campaigners and leaders or candidates not observing Covid-19 protocols.
In a first major outbreak of violence during the West Bengal polls, five persons were killed and five candidates were attacked during the fourth phase of the elections.
Banerjee also urged the poll watchdog to rescind its notice, contending she has not violated the model code or the various sections of the Indian Penal Code.
He also accused Chief Minister Mamata Banerjee of instigating people against the central forces.
The decision comes against the backdrop of four persons being killed as central forces allegedly opened fire after coming under attack from locals.
TMC Rajya Sabha MP Dola Sen said that when Chief Minister Mamata Banerjee had pointed to the excesses of the central forces, she was twice issued a showcause notice.
In the mail signed by TMC MP Derek O'Brien, the party said that 'BJP goons' were 'preventing' TMC agents from entering the booths.
According to the EC, the fixing of the schedule of the election is exclusively within the domain of the commission.
In a letter to leaders of all recognised political parties, the poll panel said, 'It is widely known that in the recent weeks, COVID cases are being reported in larger numbers.'
Following complaints from Congress and DMK on unauthorised transportation of EVMs and a VVPAT machine, the Chennai Corporation suspended the staff involved.
Banerjee had alleged that the Central forces favoured the Bharatiya Janata Party during the polling in the first and second phase of West Bengal assembly elections.