(Reuters) -Indian carmaker Tata Motors' shares plummeted about 9% to a 14-month low on Thursday, after its third-quarter results set off growth and margin concerns for its luxury Jaguar Land Rover (JLR) segment.

The stock hit the day's low of Rs 684.25. Jefferies downgraded Tata Motors from 'buy' to 'underperform'. The firm also reduced its price target to Rs 660 from Rs 930.

Tata Motors share price declined 8% in the morning trade on Thursday following the automaker’s Q3 results wherein it reported a double-digit fall in profit.

Indian carmaker Tata Motors fell more than 7% in early trade on Thursday after reporting a bigger-than-expected drop in quarterly profit, which pushed a slew of brokerages to slash price targets on the stock.