Accusing the state government of "quietly" renewing land lease to the Tatas, Trinamool Congress has threatened to resume its movement in Singur for return of 400 acres of land forcibly acquired from farmers.

"When we were busy with Lok Sabha elections, the Left Front government quietly renewed lease of the land to the Tatas at Singur. We will resume our agitation for return of the 400 acre after six of our MPS take oath on Tuesday," Trinamool Congress chief Mamata Banerjee said in Kolkata.

The state government had renewed the lease in Singur though the Tatas had not announced any plan to resume work, she claimed, adding, "The Tatas also holds unutilised land in Gujarat and Kalinganagar in Orissa".

"It is unacceptable to us that some people will go on increasing their land holding while another section will not have enough to eat," Banerjee, the new Railway minister, said.

Earlier, the Tata's Nano project, planned at Singur, was shifted out of the state following strong protest from the Trinamool Congress.