The Sensex at the Bombay Stock Exchange declined 261 points, or 1.4 per cent, to 18,460 within the first few minutes of trade, this morning, on sustained selling by investors, after disappointing quarterly results by IT major, Infosys, and a fall in stock markets across the globe. Later, after the release of poor industrial output data, the Sensex extended its losses, and stood a hefty 382 points, or 2 percent in negative territory, at 18,339, in afternoon trade, a short while ago. IT stocks were the biggest loser, with the IT sectoral index at the Bombay Stock Exchange slumping as much as 3.4 percent. Elsewhere, key stock indices in Japan, Hong Kong, China, Indonesia, Singapore, South Korea and Taiwan down by between 1 percent and 2 percent, today, as worries about the spread of the European Union's debt crisis rattled investors. Over in the US, the Dow Jones Industrial Average had declined 1.2 per cent, overnight.