The Central Bureau of Investigation has served a notice to Trinamool Congress MP Abhishek Banerjee's wife Rujira in connection with alleged irregularities in her bank account.

The five-member CBI team came to the South Kolkata residence of Abhishek Banerjee, but the couple was not at home. So the summon was handed over to family members.

The summons come days after the agency conducted raids in Kolkata, Asansol, Raniganj, Bardhaman and Purulia in connection with the coal smuggling case.

It is alleged that the coal mafia paid regular kickbacks to Trinamool Congress leaders via the party's youth wing general secretary Vinay Mishra

Trinamool's youth wing is headed by Abhishek Banerjee.

Vinay Mishra has been absconding since the CBI raided his home in December last year. There is a non-bailable warrant out against him.

The CBI is probing the case involving pilferage of coal from the Eastern Coalfields mines in the Dhanbad-Asansol belt, resulting in loss of revenue for the Centre and the states running into thousands of crores.

The BJP claims that the main beneficiary of the scam is Abhishek Banerjee.