BENGALURU, April 15 (Reuters) - Indian shares opened lower Monday as investors sold riskier assets after Iran's retaliatory attack on Israel over the weekend spurred fears of a wider regional conflict.

The NSE Nifty 50 was down 0.82% at 22,334.15 as of 9:18 a.m. IST, while the S&P BSE Sensex fell 0.86% to 73,624.

All the 13 major sectors logged losses. The broader, more domestically-focussed small- and mid-caps lost about 3% and 2%, respectively. (Reporting by Bharath Rajeswaran in Bengaluru; Editing by Rashmi Aich and Varun H K)