Mumbai, June 19 -- The Indian rupee extended decline for the third straight session and plunged to a three month low on Thursday. INR depreciated 30 paise to close at 86.73 (provisional) against US dollar on Thursday, weighed down by the strength of the American currency in the overseas markets and rebound in international crude oil prices fuelled by ongoing geopolitical uncertainties. Moreover, muted domestic equity markets also added pressure on the rupee. A cautious undertone prevailed as investors reacted to hawkish commentary from the Federal Reserve and rising tensions in the Middle East. At the end of a two-day policy meeting on Wednesday, the U.S. central bank left interest rates unchanged but warned about higher inflation and slo...