KARACHI (Reuters) The stocks fell on Tuesday, with volume striking a 13-month low, as investors stayed on the sidelines amid concerns over security in Karachi. Shortened trading hours during the holy month of Ramazan also contributed to the drop in trade. "Volumes at Karachi Stock Exchange touched a 13-month low as investors remained out of market with the inception of Ramazan," said Samar Iqbal, a dealer at Topline Securities. The Karachi Stock Exchange's benchmark 100-share index ended 0.22 percent, or 27.06 points, lower at 12,226.33 on turnover of 14.94 million shares. Dealers said investors were also cautious following the killing of another 26 people over the past 24 hours in the southern port city. The Karachi Stock Exchange (KSE) will open at 9:15 a.m. and close at 2:00 p.m. from Monday to Thursday, and at 1:00 p.m. on Fridays, throughout Ramazan. APP adds from Lahore: Lahore Stock Exchange shed 14.34 points on Tuesday as the LSE-25 index opened with 3085.28 and closed at 3070.94 points. The market's overall situation also did not correspond to an upward trend as it remained at 584,389 shares to close against the previous turnover of 1.442 million shares, showing a difference of 858,370 shares. While out of the total 110 active scrips 11 moved up, 78 remained equal and 21 shed values. MCB Bank Limited, Adamjee Insurance Company and Fauji Fertilizer Company were major gainer of the day by recording increase in their per share value by Rs 2.70, Rs 1.75 and Re 0.95 respectively. Attock Refinery Limited, Netsol Technologies Limted and D.G.Khan Cement Company lost their per share value by Rs 1.38, Re 0.33 and Re 0.26 respectively. The volume leader of the day included NIB Bank Limited (LOR) with turnover of 100,080 shares, Silkbank Limited (Saudi) with 80,109 share and NIB Bank Limited with 61,740 shares.