By Rex Crum, MarketWatch

SAN FRANCISCO (MarketWatch) -- Thursday's trading session was mostly negative for tech stocks as they followed the broader market south on growing tensions in Ukraine.

The government in Kiev said Russian troops have entered the eastern part of Ukraine and a NATO military official told Dow Jones Newswires that Russia's army has taken a "more overt" position in the country.

By the time the market closed, the tech-heavy Nasdaq Composite Index (RIXF) had fallen almost 12 points to close at 4,557, while the Philadelphia Semiconductor Index (SOX) managed to eke out a small gain.

(Read more about the market's reaction to the Ukraine situation in Market Snapshot http://www.marketwatch.com/story/us-stocks-futures-slip-ahead-of-gdp-data-2014-08-28.).

Cloud-based human-resource software company Workday Inc. (WDAY) had a rough go of it, falling almost 5% to close at $85.89 a share.after reporting a wider second-quarter loss, but its results still exceeded Wall Street analysts forecasts.

Yelp Inc. (YELP) gave up 0.7% to close at $82.32 a day after a Goldman Sachs report said the online review and recommendation company, and some other Internet companies, could be attractive acquisition targets this year.

Declines also came from Hewlett-Packard Co. (HPQ), Google Inc. (GOOGL) Amazon.com Inc. (AMZN) and IBM Corp. (IBM).

Twitter Inc. (TWTR) shares rose almost 3%, to $49.43, as the microblogging company released its Twitter analytics dashboard to all of its users, giving anyone with a Twitter account the ability to see just how many people are reading their tweets.

Apple Inc. (AAPL) rose 12 cents a share to close at $102.25. The company sent out invitations to members of the media for a company event on Sept. 9 in which Apple is expected to unveil the next version of the iPhone.

Yahoo Inc. (YHOO), Lexmark International Inc. (LXK) and VMware Inc. (VMW).

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