India vowed on Thursday to protect its labour-intensive agriculture sector, a central sticking point in bogged-down trade talks with the U.S., as Washington threatened 25% tariffs, triggering outrage from the opposition and a slump in the rupee.

NEW DELHI (Reuters) -Indian opposition parties criticised the government on Thursday, describing U.S. President Donald Trump's threat of a 25% tariff as a diplomatic failure for New Delhi, while the rupee currency tumbled and equity indexes slid in response to the news.