"We are taking note of each and every development and will act immediately if there is any hint of possible violation of corporate governance and listing norms or any other regulation under our jurisdiction," a senior official said.
The Securities and Exchange Board of India (Sebi) is also looking into the alleged disclosure made in the purported letter written by ousted chairman Cyrus Mistry to Tata Sons' board members including about financial and other irregularities as also lapses on the corporate governance front, sources said.
The price movement and trading volumes for few days prior to the surprise announcement will also being look into.
In an explosive confidential email to Tata Sons board members, Mistry said he was promised a free hand when he was appointed Chairman in December 2012 but Articles of Association were modified, changing the rules of engagement between the Tata family Trusts and the Board of Tata Sons.
Also, 'ethical concerns' had been raised over certain transactions and a "recent forensic investigation revealed fraudulent transactions of Rs 22 crore involving non-existent parties in India and Singapore," he wrote.
He highlighted his predecessor's loss-making Nano car project that consistently lost money but could not be shut down for "emotional reasons" and because it would have stopped the supply of Nano gliders to an electric car making entity where Tata had stake.
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