Mumbai, May 13 (IANS): Key Indian equity market indices that opened in the red on Friday fell further during the afternoon session following disappointing macro data on Thursday.

India's factory output growth turned flat in March after rising during the month before, even as the annual retail inflation for April rose to 5.39 percent from 4.83 percent in March, official data showed on Thursday.

The 30-scrip Sensitive Index (Sensex) was trading 354.73 points or 1.38 percent lower during the afternoon session.

The wider 50-scrip Nifty of the National Stock Exchange (NSE) was also trading 104.95 points or 1.33 percent lower at 7,795.45 points.

The BSE Sensex, which opened at 25,739.94 points, was trading at 25,435.49 points (at 12.44 p.m.) in the afternoon session, lower 354.73 points or 1.38 percent from the previous day's close at 25,790.22 points.

The Sensex touched a high of 25,743.69 points and a low of 25,400.27 points in the trade so far.

Almost all the sectors were trading in red. Heavy selling pressure was seen in realty, metal and banking sectors.

The S&P BSE realty index plunged by 1.99 percent, metal index dropped by 1.92 percent and bankex fell by 1.60 percent.