US STOCKS-Wall St loses ground on Ukraine worry; data curbs losses
* Russian troops in Ukraine spur concern
* U.S. GDP revised higher in Q2, jobless claims fall
* Banks in focus after reports of cyber attacks
* Indexes down: Dow 0.25 pct, S&P 0.17, Nasdaq 0.26 pct (Adds background on Ukraine, economic data, updates indexes to close)
By Chuck Mikolajczak
NEW YORK, Aug 28 (Reuters) - U.S. stocks edged lower on Thursday after the latest tension between Ukraine and Russia snapped the focus of investors back to the volatile region, but U.S. economic data helped curb losses.
Worries over tension abroad had largely receded from Wall Street, with major indexes seeing few negative days over the past two weeks, and the Dow and S&P both hitting record highs.
Ukraine's security and defense council said the border town of Novoazovsk and other areas of Ukraine's south-east had fallen under the control of Russian forces, together with rebels. The U.S. accused Russia of active fighting in Eastern Ukraine, and said it was considering a range of responses, including more sanctions.
While few U.S. companies have heavy exposure to either country, investors are concerned about the potential response by the United States and Europe to any escalation in hostility. Continuación...