The BSE benchmark Sensex which lost 67 points in early trade declined further by mere 7 points on sustained selling by funds, triggered by a weak trend on Asian bourses. After falling 67 points to 17,027 in the opening session, the 30-share index fell further by 7 points to 17,087 in noon trade.In a similar fashion, the wide-based National Stock Exchange index Nifty slided by 0.70 points to 5,206.