The rupee weakened slightly on Thursday, snapping a three-day rising streak, as the dollar rallied broadly after minutes from the Federal Reserve July meeting suggested potentially earlier-than-expected rate hikes.
The US dollar traded at 11-month highs against a basket of major currencies after the Fed's minutes suggested any strong jobs market recovery could lead it to raise interest rates earlier than it had been anticipating.

Source - http://economictimes.indiatimes.com