New Delhi, Dec 21 (IANS): Bharatiya Janata Party (BJP) chief Nitin Gadkari is involved in corruption, Congress leader Digvijaya Singh said Friday soon after a Delhi court granted him bail in a defamation case filed by the opposition leader.

Metropolitan Magistrate (MM) Sudesh Kumar asked Digvijaya Singh to furnish a surety of Rs.50,000. The court's order came on the defamation complaint filed by Gadkari Oct 1.

In his complaint, Gadkari said the Congress leader dragged his name into alleged irregularities in the allocation of coal blocks.

The BJP leader recorded his statement in the court that he was "not responsible for any coal block allocation to anybody".

The Congress leader, who was present in the court, sought a copy of the CD produced as evidence against him.

"I have no personal fight with Gadkari but will tell the people and the court that though the BJP says it is fighting against corruption, its party chief is involved in corruption," Digvijaya Singh told reporters after the court order.

"Gadkari worked as a businessman and had many fake companies to earn profit. I will do more research and tell people who Gadkari is," he said.

The court had issued summons to Digvijaya Singh to appear before it.

Later, Gadkari's lawyer Pinky Anand told reporters: "Digvijaya Singh appeared before the court and sought bail. He was asked to submit surety of Rs.50,000, which he has submitted. He was also asked to submit a personal bond, to secure his presence before the court."

According to Pinky Anand, the Congress leader's plea for personal exemption was declined by the court.

"The application moved by him for personal exemption will be considered in the next date Jan 31, 2013, and he should appear," Anand said.