Shares of liquor companies on Thursday plunged as much as 8 per cent after Bihar Chief Minister Nitish Kumar announced a ban on liquor in the state. Shares of United Spirits settled at Rs 3,211.45 on BSE, down 4.74 per cent. Radico Khaitan went down by 6.92 per cent to close at Rs 114.25. While Pincon Spirit closed at Rs 101.75, down 2.02 per cent, Som Distilleries at Rs 189.30, down 0.05 per cent. However, bunking the trend United Breweries went marginally up by 0.13 per cent to close at Rs 958.65. Fulfilling his poll promise, Nitish Kumar on Thursday announced the ban of alcohol in Bihar from April 1 next year. “I had made a promise that if my government returns to power we will impose prohibition. The government is committed to fulfil its promise,” he said.