Bengal Chief Minister Mamata Banerjee on Wednesday extended her support to the Congress hours after Sonia Gandhi’s son-in-law Robert Vadra appeared before the Enforcement Directorate (ED) for interrogation in a money laundering case.

In a statement that can be perceived as a new resolution for closer cooperation with the Congress, Mamata said, “We are united and we will fight together”.

The West Bengal chief minister said that as a team, a complaint would be lodged with the Election Commission (EC) on central agencies being used to malign the Opposition.

Mamata brushed off Vadra’s questioning by the ED as “nothing serious”.

“There is no serious case, nothing, just sending the notice casually to everybody. So we stand together, we are united,” she said.

Robert Vadra on Wednesday afternoon appeared before the ED four days after a Delhi court ordered him to join the investigation. The ED questioned him for around six hours in a money laundering case and asked him to join the probe again on Thursday.

According to an ED official, Vadra was asked questions related to transactions, purchase, and possession of certain immovable assets in London.

Read | Robert Vadra called again on Thursday by ED; answered every question he was asked, says lawyer

Vadra’s questioning assumes significance in view of his wife Priyanka Gandhi Vadra taking charge as the AICC general secretary of Uttar Pradesh (East) the same day.

Mamata’s support comes in the wake of Congress President Rahul Gandhi calling her up and extending support to her dharna to protest “insults” faced at the hands of Prime Minister Narendra Modi and BJP chief Amit Shah.

Gandhi assured that the entire opposition stands shoulder to shoulder with Banerjee and will defeat the fascist forces.

An all-out war broke out between the Centre and the Mamata Banerjee government on Sunday, with the feisty West Bengal leader beginning a sit-in protest at a city landmark over the CBI’s attempt to question the Kolkata Police chief, insisting it stifled the spirit of “Constitution and federalism”.

Read | High drama as CBI goes to investigate Kolkata Police chief Rajeev Kumar; Mamata Banerjee begins dharna

An intense drama was witnessed on Sunday afternoon when a team of 40-odd CBI officers reached Kumar’s residence, and a team of Kolkata Police officers rushed there to inquire if they had the documents required to question the CP.

Some CBI men were then bundled into police jeeps and taken to the police station.