The Indian equity indices extended losses for the second consecutive session on April 15 on wide-spread selling, as Israel and Iran tensions weighed on investors' risk appetite who will also be closely track March quarter results at home.

At close, the Sensex was down 845.12 points, or 1.14 percent, at 73,399.78, and the Nifty was down 246.90 points, or 1.10 percent, at 22,272.50.

The market started the session gap-down and extended losses as the day progress, with Nifty falling around 22,250 amid selling across the sectors except oil & gas.

Biggest losers on the Nifty included Shriram Finance, Wipro, Bajaj Finance, ICICI Bank and Bajaj Finserv, while gainers were ONGC, Hindalco Industries, Maruti Suzuki, Nestle India and Bharti Airtel.

Among sectors, except oil & gas and metal, all sectoral indices ended in the red. BSE midcap and smallcap indices were down 1.5 percent each.

Among individual stocks, a volume spike of more than 300 percent was seen in SAIl, Exide Industries and Mahanagar Gas.

A long build-up was seen in ONGC, Indus Towers and Gujarat Gas, while a short build-up was seen in Coforge, Atul and Bandhan Bank.

More than 150 stocks touched their 52-week high including Exide Industries, SAIL, Honeywell Automation, Hindalco Industries, Aegis Logistics, Anand Rathi, Ashiana Housing, Aster DM Health, Bharat Electronics, HEG, Puravankara, Thermax, Vedanta, Waaree Renewable, among others.