Profit-booking ahead of tomorrow's futures and options (F&O) June contract expiry also weighed to some extent.
After trading in positive zone for most part of the day, the index plunged over 200 from a high of 27,948.24 at the fag-end tracking losses in European stocks.
"The news that the creditors rejected Greece's new proposal for a deal took a toll on the market movements," said Alex Mathews, Head Research at Geojit BNP Paribas Financial.
"The insistence of certain institutions of not accepting parametric measures has never happened before -- not in Ireland, nor in Portugal," he wrote in a Twitter post.
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The BSE Sensex after a positive start, hit a high of 27,948.24 on sustained buying largely in tune with above-normal progress in monsoon.
However, it slipped towards the close on negative global cues and touched day's low of 27,647.29, before settling 74.70 points or 0.27 per cent down at 27,729.67.
In previous eight sessions, BSE barometer had zoomed by 1,433.39 points or 5.4 per cent as better-than-forecasted monsoon raised hopes of a rate cut by RBI.
Meanwhile, foreign investors sold shares worth Rs 374.97 crore yesterday as per provisional data, while domestic institutional bought shares worth Rs 404.20 crore.
In overseas markets, European stocks were trading lower. Key benchmark indices in France and Germany were lower in the range 0.05 to 0.30 per cent, while the UK's FTSE index was up by 0.43 per cent.