The police would take stern action if any political party stages a demonstration at Singur's Tata Motors factory site and poses an obstruction to the ongoing work there, said Ashok Mohon Chakraborty, West Bengal home secretary, Wednesday.

'No political party can arrange agitation programme obstructing the main gate of Tata Motors project in Singur. If there's any such incident, the police will take strong action against them,' Chakraborty said after attending a meeting in West Bengal's Singur, about 40 km from here.

He said the security at the Singur factory site would also be stepped up to tackle untoward incidents during political agitation.

A high-level meeting, chaired by Chakraborty, was held in Singur Wednesday to discuss the law and order situation there. A.B. Vora, state's director general of police, and other senior government officials also attended the meeting.

Renewed agitation by the state's principal opposition force the Trinamool Congress has threatened to delay the rollout of the world's cheapest car, Nano, from Singur.

Asked about Aug 24 agitation announced by the Trinamool Congress, Chakraborty said: 'We have discussed that issue in the meeting but will take the final decision later.'

Trinamool Congress chief Mamata Banerjee earlier threatened to lay siege to the Tata Motors factory in Singur for an indefinite period from Aug 24 to force the West Bengal government to return 400 acres of land 'forcibly' acquired from farmers.

Unveiled in January at an auto exposition in New Delhi, the four-seater Nano promises a dealer price of Rs.100,000 ($2,500), about half the cost of the cheapest car in today's market Maruti 800, a 25-year-old model from Maruti Suzuki.

However, the washout of the ruling communists in the recent local body elections in Singur over the issue of land seizure triggered a volley of fresh protests by those who lost their land, led by the Trinamool Congress.

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