KOLKATA: Tata Group chairman Ratan Tata has expressed anxiety in the wake of the call for an indefinite agitation by Trinamool Congress chief Mamata Banerjee from August 24 demanding return of 400 acres of land which, she alleged, was forcibly acquired from farmers for the Tata car project at Singur.

West Bengal Industries Minister Nirupam Sen called on Mr. Tata here late in the evening on Thursday to discuss the developments.