India's Tata Group announced on Friday it was abandoning a plant in eastern India slated to turn out the world's cheapest car after weeks of violent demonstrations triggered by a land dispute. "You cannot run a plant with police protection, you cannot run a plant when bombs are being thrown, you cannot run a plant when workers are being intimidated," Tata Group chief Rata Tata told a news conference in Kolkata, capital of the Marxist-ruled state of West Bengal.