Sources said Rujira had reached Netaji Subhas Chandra Bose International Airport in Kolkata with her two children around 7am before being stopped before immigration.
The ED had earlier claimed that Abhishek Banerjee was a beneficiary of funds obtained from this illegal trade.
The Delhi High Court Tuesday refused to grant any interim relief to TMC MP Abhishek Banerjee and his wife seeking quashing of summons issued by the Enforcement Directorate (ED) in a money laundering case linked to an alleged coal scam in West Bengal.
Banerjee, nephew of West Bengal Chief Minister Mamata Banerjee and the national general secretary of the TMC, and his wife Rujira Banerjee have been asked to depose before the investigation officer here next week, they said.
The central agency asked Banerjee to appear at its Kolkata office on Friday morning, he said.
The CBI's visit to Abhishek's residence comes after Rujira told the central agency that she will be available for examination between 11 am and 3 pm on February 23, replying to a notice that the sleuths had hand-delivered her on Sunday.
"Though I am unaware of the reason for me being called for questioning or the subject matter of the investigation, you may visit my residence as per your convenience between 11 am and 3 pm tomorrow, i.e. 23 February, 2021," she said in her letter to CBI.
The central probe agency had on Friday carried out a fresh round of searches in connection with the case, they said.