Sensex, Nifty at the low point of the day; auto shares decline

The domestic equity barometers extended losses and hit fresh intraday low in mid-morning trade. The Nifty traded below the 17,550 level. Auto shares witnessed across the board selling for second day in a row. Investors remained cautious ahead of the release of the US Fed's Beige Book, which summarises the state of the world's largest economy, due later today.