MoreThe ticker symbol and trading information for LinkedIn Corp. is displayed on a screen at the post where it is traded, before the start of trading, on the floor of the New York Stock Exchange NYSE in New York City, U.S., June 13, 2016.

MOSCOW Reuters - The U.S. government said on Friday it was deeply concerned over Russia's decision to block public access to networking site LinkedIn, saying it created a precedent that could be used to justify blocking other sites operating in Russia.

LinkedIn , which has its headquarters in the United States, is the first major social network to be blocked under a new law that requires firms holding Russian citizens' data to store it on servers on Russian soil.

Internet services analysts say other tech firms, including Facebook and Twitter , could also find access blocked unless they move data onto Russian-based servers.

Maria Olson, spokeswoman at the U.S. Embassy in Moscow, said Washington urged the Russian authorities to restore access immediately to LinkedIn, and said the restrictions harmed competition and the Russian people.

"The United States is deeply concerned by Russia s decision to block access to the website LinkedIn," Olson said in a statement sent to Reuters.

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