Foreign investors turned net sellers in October, offloading shares worth Rs 27,142 crore in just the first three days of October due to intensifying conflict between Israel and Iran, a sharp rise in crude oil prices, and improved performance of Chinese markets.The outflow came after FPI investment reached a nine-month high of Rs 57,724 crore in September.Since June, Foreign Portfolio Investors (FPIs) have consistently bought equities after withdrawing Rs 34,252 crore in April-May.