U.S. equity markets extended declines, hitting session lows in afternoon trade on Tuesday, with the Dow on track to a fifth straight session of losses. If Dow closes in negative territory it would be the longest losing stretch since March 2017. The losses were led by a selloff in industrials, materials and technology sectors. The Dow Jones Industrial Average fell 250 points, or 1%, to 24,190. The S&P 500 index fell 17 points, or 0.7%, to 2,652. Meanwhile the Nasdaq Composite declined 74 points, or 1% to 7,054. Among the worst performers on the Dow, 3M Company shares fell nearly 8%, while Caterpillar Inc. slumped more than 3%, after trading 4% higher in the morning. Among technology shares, Google-parent Alphabet shares tumbled 4.2% even as the tech company reported earnings on Monday that beat expectations.