The Sensex at the Bombay Stock Exchange, which had plunged 225 points, or 1.4 per cent, in opening trade, today, fell even futher in afternoon deals, and stood 329 points, or 2 percent in the red, at 16,141, a short while ago. All the sectoral indices were trading in the negative zone. The domestic market tanked, following the big fall in the global bourses, on growing worries about Europe's deteriorating debt crisis.