MUMBAI: Falling for the second straight session, the benchmark Bombay Stock Exchange (BSE) Sensex on Thursday fell over 133 points to close at a one-week low of 28,666.04 with IT shares coming under selling pressure on caution ahead of TCS results.

The 30-share index opened higher at 28,876.23 and stayed in the positive zone briefly on sustained foreign capital inflows.

On emergence of profit-booking in bluechips, it slipped into the red to touch day's low of 28,497.70 before settling 133.65 points down or 0.46 per cent at 28,666.04.

This is gauge's lowest closing since April 7 and has now lost 378.40 points in straight two sessions.

The 50-issue National Stock Exchange (NSE) Nifty also dropped by 43.50 points or 0.50 per cent to end at 8,706.70 after shuttling between 8,760 and 8,645.65 intra-day.

Stocks of all the three top IT companies ended as major losers on the day.

Infosys lost 1 per cent to close at Rs 2,191.10, Wipro was down 0.82 per cent at Rs 601.60, while TCS closed lower at Rs 2,585.20 down by 1.50 per cent. India's largest IT company TCS will announce its March quarter earnings after market hours on Thursday.