The order said the commission has noted "with anguish" that many political parties and candidates are still not adhering to the prescribed safety norms during the public gatherings.
The TMC boss, who addressed three rallies during the day, said it was a "matter of shame" that the PM, with his "provocative" remarks, tried to influence people.
Elections, which began at 7 am, are being held in 43 assembly seats -- 17 in North 24 Parganas district, nine each in Nadia and Uttar Dinajpur, and eight in Purba Bardhaman.
Chowdhury, who is one of the key campaigners of the Congress-ISF-Left alliance in the ongoing assembly elections, said he would continue to campaign through virtual platforms.
The chief secretary of the state, the CEO and all district election officers are also being directed to scrupulously follow the high court's directions.
Bengal polls HIGHLIGHTS | Hurling of bombs, PM Modi's campaign cancellation mark end of sixth phase polling
With a voter turnout of around 80 percent, a total of 43 seats went to the polls in this phase to decide the fate of 306 candidates in the fray.
Three persons, who were arrested in connection with the incident, were remanded to police custody for seven days.
Bengal polls 2021: Bomb hurled on BJP candidate Shilbhadra Dutta's car in North 24 Parganas district
Dutta claimed that he was taking tea at a roadside stall on Kalyani Expressway at Rahara when someone threw the bomb which exploded a few metres away from his vehicle.
In a letter to the Trinamool Congress, the poll panel cited election law and various steps it has taken to ensure safety of voters in view of the coronavirus pandemic to rule out any change.
Kishor's statement came after Modi addressed the nation on the coronavirus situation amid a surge in cases.
Ghosh said the state had plunged into a major crisis but the CM skipped several meetings convened by the PM to help tackle the matter.
Assembly seats in the Matua strongholds of Bongaon and Krishnanagar, close to the India-Bangladesh border, are set to go to polls in the sixth phase of elections, on April 22.
Mamata has lambasted the election panel on several occasions in the recent past accusing it of acting at BJP’s behest.
The Trinamool Congress supremo accused the prime minister of allowing open market sale of vaccines despite depleting stocks.
Hakim -- during a roadshow in the south-western part of Kolkata - allegedly threatened to take action against the saffron party and the CISF, once the assembly polls get over.