A parliamentary delegation of the Trinamul Congress will meet Election Commission officials in Delhi on Friday over concerns following the alleged attack on party supremo and Bengal Chief Minister Mamata Banerjee, party sources said on Thursday.

Six TMC MPs from both the Houses of Parliament are expected to arrive in Delhi to join the delegation, a source said.

A delegation of the party met poll panel officials in Calcutta on Thursday and later alleged that the "Election Commission did nothing despite there being reports of a possible attack on Banerjee".

Claiming that the attack was a "deep-rooted conspiracy to take the life of the TMC supremo", party leaders said anti-social elements have been mobilised from the neighbouring states by the BJP in Nandigram to unleash violence.

The EC can't shun responsibility as it is in charge of the law-and-order situation in poll-bound Bengal, it said.

The Trinamul Congress supremo was injured in the leg after being allegedly pushed by unidentified people near a temple at Reyapara area during campaigning at Nandigram on Wednesday, where the BJP has pitted her protege-turned-adversary Suvendu Adhikari against her.

Banerjee alleged that she was pushed by four to five men while she was trying to get into the car, following which fell flat on her face.

Earlier in the day, TMC activists blocked roads, burnt tyres and raised slogans, blaming the BJP for the alleged attack.

Besides several areas in Calcutta, including Chetla and Sovabazar, TMC workers protested in Howrah, Hooghly, Bankura, Paschim Medinipur, Jalpaiguri, Paschim Bardhaman and Purba Medinipur, among others.

Following this, the TMC supremo urged her supporters on Thursday to maintain peace and not do anything that would inconvenience the public.

In a video message from the hospital bed, Mamata said she would be back for poll campaigning in a few days and would probably need to use a wheelchair for some time.

"I appeal to my party cadres, supporters, activists and common people to maintain peace and calm. It is true that I was badly hurt last night and felt severe pain in the chest and head. The doctors are looking after me," she said.

"I appeal to everyone to maintain peace. I hope to be back on the field in the next few days," Mamata added.

Doctors treating her said that the chief minister is stable but is suffering from severe pain in her injured left leg and has a low sodium concentration in blood.

She will be under strict observation for the time being, they said