"If the Tatas appear unwilling, a coach factory for metro rail will be built on the 600 acres," Banerjee said on Singur Divas, the day the agitation against the Nano factory started in 2006.
On August 30, Tata group chairman Ratan Tata said in Kolkata the conglomerate would not invest in West Bengal unless it was sure there was no hostility towards it.
In October 2008, Tata Motors withdrew from Singur, citing constant opposition to the factory from Trinamool chief Banerjee.
Earlier, as rail minister, Banerjee had announced a coach factory for metro rail at a spot in Singur. That project is now proposed to be shifted to the Nano factory land.
Banerjee's party colleague Dinesh Trivedi is now railway minister.