Mumbai: Cutting short two weeks of modest gains, both the key indices, Sensex and Nifty, tumbled by over 2 per cent due to a host of negative factors.

The market resumed on a weak note on investor concerns over slow growth in US jobs and global economic recovery.

Besides, investors have been cautious ahead of the fourth quarter corporate earnings, industrial growth data and the apex bank's annual monetary policy next week.

First and the last days of the week saw a heavy sell-off due to which the BSE 30-share Sensex tanked by 391.51 points, or 2.24 per cent, to settle at about two-week low of 17094.51.

The NSE wide-based 50-issue Nifty plunged by 115.45 points, or 2.17 per cent, to 5,207.45.

On the last day of the week, disappointing growth outlook by IT bellwether Infosys for current fiscal and prevailing economic environment pulled the Sensex down. During the week, Infosys plunged by 15.69 per cent, contributing in the Sensex fall in a major way.

In dollar terms, the Bangalore-based company was unable to meet even the lower end of its revenue guidance of USD 1,806 million-1,810 million for Q4 FY'12, as revenues stood at USD 1,771 million.

Top software exporter TCS and the third largest software exporter Wipro also dropped in line with Infosys by 9.23 points and 4.91 points. The BSE-IT and BSE-Teck were the top losers from the sectoral indices, falling 11.50 per cent and 9.56 per cent, respectively.