New Delhi: Congress president Rahul Gandhi on Tuesday said the media's reluctance to raise questions about railway minister Piyush Goyal's financial dealings was a tragedy.

"Piyush Goyal's 48 crore Flashnet scam is about deceit, conflict of interest and greed. The evidence is on the table. Yet, the media will not touch the story," Rahul tweeted even as his party kept up the attack on the minister.

"It is a tragedy for our country when journalists entrusted to stand for the truth, will not speak," Rahul added.

Graphics attached to Rahul's tweets said Goyal sold his stocks in Flashnet Info Solutions to the Piramal Group at 1,000 times the face value.

The Piramal Group had interests in the power sector when Goyal was minister of state (independent charge) in the power ministry.

A post on the party's official website said: "For the past month, Union Minister Piyush Goyal has been in the eye of a storm as accounts of his dodgy corporate dealings are being revealed one after another. The latest story is that Goyal and his wife Seema Goyal sold the entire stock of shares of Flashnet Info Solutions Pvt. Ltd, a company owned by them, at 1,000 times the face value to Piramal Estates."

The post summed up other dealings the Congress has dwelt on in at least half a dozen media conferences and recalled that Shirdi Industries - Goyal was the chairman until 2010 - was accused of defaulting on loans worth Rs 650 crore.

"When Shirdi Industries was taken to the Company Law Tribunal, the consortium of banks agreed to a 60% haircut (loan waiver) and the company went back to its promoters," it said.

"As more and more layers of Goyal's life are being peeled off, it exposes a complicated matrix that mixes business, politics, and personal interest," the post added. "We suggest that the BJP provide the people with concrete evidence in defence of the Union minister rather than blaming the Congress for asking legitimate questions."

The Congress has asked Goyal to resign till an independent investigation clears him.

The BJP and Goyal have rebutted most of the allegations but the Congress accused them of misleading people.

After Rahul's scathing tweet, Goyal tweeted: "Till 26th May 2014, before I became a Minister, I was a professional Chartered Accountant & investment banker. Unlike you, Mr Rahul Gandhi, I have not learnt well the art of living without working. I am also a kaamdaar (worker) and not a naamdaar (dynast)."

Goyal appeared to have picked the " kaamdaar-naamdaar" phrase from a speech by Prime Minister Narendra Modi at an election rally in Karnataka.

"The Congress president threw a challenge at me. He said if he was allowed to speak in Parliament for 15 minutes, Modi will not be able to sit," the Prime Minister had said.

"He is right, I am a kaamdaar (ordinary worker), how can I sit before a naamdaar (celebrity). I can't even wear good clothes, how can I sit before you," Modi had added, twisting the debate into a class conflict.

Rahul had said: "I will speak for 15 minutes on the banking scam and Rafale and Modi will not be able to sit in Parliament."

Modi did not respond to either of the specific charges - the banking scam or the Rafale fighter aircraft deal that has triggered controversy.