The board of directors of Tata Steel met here today, presumably to discuss the strategy to be adopted for countering Brazilian steelmaker CSN's counter-bid for Anglo-Dutch firm Corus.CSN had, last week, approached Corus with a 475 pence per share offer as against Tata's 455 pence per share, and has also started the due diligence of Corus accounts.Tata Steel officials remained tight-lipped about the board meeting, but market observers believe the company considered the option of raising its $8.1 billion offer for Corus.Tata Steel has already completed the due diligence process of Corus, and is understood to have readied the funds for the takeover. The company, however, was awaiting a formal bid by CSN, investment banking sources said.Corus shareholders are expected to consider the Tata offer at an extra-ordinary general meeting scheduled on December 4.