Erasing early gains, the BSE benchmark Sensex today lost 30 points in the late morning trade due to fresh selling pressure mainly in metal, capital goods, IT and technology sectors amid mixed Asian cues. The 30-share index resumed slightly lower at 19,679 and hovered in a range 19,737 and 19,651 before quoting at 19,653 at 1030 hrs.The NSE 50-share Nifty also declined marginally by 1.75 points or 0.03 per cent to 5,943.95.