NEW YORK – Renewed concerns that tensions could flare up between Russia and Ukraine pushed U.S. stocks sharply lower Tuesday.

The market had been moderately lower all day, weighed down by a disappointing earnings forecast from retail giant Target and a report on China that showed the world’s second-largest economy was slowing down.

The selling accelerated in afternoon trading. The Dow Jones industrial average fell nearly 200 points at one point but recovered some of those losses in the last 30 minutes of trading.

Several traders pointed to news reports of a buildup in Russian troops on the Ukraine border and comments from a Polish politician that reportedly said Russia was poised to invade or pressure Ukraine’s eastern border as catalysts for the selling.

The developments came after the most recent round of sanctions were imposed on Russia by the U.S. and Europe last week. Russia called Tuesday for a meeting of the U.N. Security Council to discuss the situation in Ukraine.

The Ukraine-Russia tensions were “outweighing any good economic data” that investors had to work with Tuesday, said Tom di Galoma, a bond trader at ED&F Mann Capital.

The Dow lost 139.81 points, or 0.8 percent, to 16,429.47, the lowest level for the index since mid-May. The Standard & Poor’s 500 index lost 18.78 points, or 1 percent, to 1,920.21, and the Nasdaq composite fell 31.05 points, or 0.7 percent, to 4,352.84.

The tensions between Russia and Ukraine have been a headache for investors for months now. However, the stakes are higher than before, investors say.

With winter a few months away, Europe’s recovering economy remains dependent on Russian natural gas for heat and electricity. Germany imports nearly all its natural gas from Russia, and France also gets a significant amount of its energy needs from Russia.

“Europe’s economy is far more exposed to Russia than the U.S.,” said Randy Frederick, a managing director at Charles Schwab.

Tuesday’s losses add to what has been a tough couple of weeks for U.S. markets. The S&P 500 fell 2.7 percent last week, its worst five-day performance since June 2012. While the market did recover some Monday, Tuesday’s losses wiped out those gains, leaving the Dow and S&P 500 lower for the week.

International events have been in the forefront of investors’ minds for the last two weeks and have been a major reason stocks have fallen.

There was the near-failure of a Portuguese bank, Argentina defaulting on its bonds, the Israeli-Gaza conflict on top of the tensions between the U.S., Europe and Russia over Ukraine.

“Once these geopolitical issues calm down, we should move higher from here,” Frederick said.

Among individual stocks, Target dropped $2.67, or 4.4 percent, to $58.03 after the company lowered its second-quarter earnings forecast. Target said the massive data breach the company experienced last year was costing far more than previously expected. Shoppers remain cautious about shopping at the store, Target said.