In Indian NFRA - which is part of the corporate affairs ministry - has been asked to look into the matter.
Vodafone Idea plummeted 23.36 pc to close at Rs 4.33 on the BSE. In intra-day, it tanked 27.43 pc to Rs 4.10 -- its 52-week low.
After gyrating over 486 points, the 30-share Sensex settled 38.44 points, or 0.10 per cent, lower at 39,020.39.
The 30-share index was trading at 197.24 points higher, or 0.50 per cent, to 39,256.07
The company had posted a consolidated PAT of Rs 2,230.49 crore in the year-ago period, Larsen & Toubro said in a filing to the BSE.
HCL Tech was the top gainer in the Sensex pack, rising 2.93 per cent, ahead of its quarterly results.
The 30-share index was trading flat at 38,963.28, and the broader NSE Nifty slipped 3.40 points, or 0.02 per cent, to 11,584.95.
The 30-share BSE Sensex ended 334.54 points, or 0.85 per cent, lower at 38,963.84.
After swinging nearly 300 points in early session, the 30-share index was trading 82.38 points, or 0.21 per cent.
The gains in the rupee were capped by crude oil hitting the USD 60 per barrel mark, forex brokers said.