Turkey's abrupt ban on Twitter stirred concerns on Friday that the country may pull the plug on other social media and Internet services as it grapples with internal turmoil.
Prime Minister Tayyip Erdogan has in the past threatened to block Facebook Inc and Google Inc's YouTube as well, though both remained online.
YouTube rejected requests by the Turkish government in recent weeks to block certain videos, according to a report in the Wall Street Journal on Friday, citing anonymous sources. Some people within Google feared an imminent blackout in the wake of Twitter's ban, the Journal cited the people as saying.
YouTube did not return requests for comment.
Twitter said on Friday it hopes access to its social media service in Turkey will be restored soon, a day after it was blocked by the country's government.
The ban, which has proven to be not entirely effective, is the latest effort by a government to squash critical comments that flow freely over online social networks.
For Twitter, the block highlights the thorny policy challenge facing the San Francisco-based company.
Analysts and observers said they were not immediately concerned that the ban in Turkey could embolden other governments to follow suit and clamp down on Twitter. But the company's easy-to-use communications service and its long-running support of free speech have made it a visible target for some governments.
While Twitter has earned the ire of other governments, Turkey's move to ban Twitter is particularly noteworthy, said Jillian York, director for international freedom of expression at the Electronic Frontier Foundation.
"It's a democracy, that's the difference. This is a country that actually has legitimate elections," said York. "That could set a dangerous precedent."
"I do think there's a risk democracies could do this," she added. "I don't think most would go so far as (banning) the entire site. I think instead what we'll see is more pressure being put on Twitter to block certain content."
Wall Street remains more focused on Twitter's overall growth prospects and its budding advertising business, with Twitter's stock finishing Friday's regular trading session up 1.6 percent at $50.92 despite the situation in Turkey.
"If it does have any ripple effects, then obviously we would be concerned, but at this point I think it's isolated," said Arvind Bhatia of Stern, Agee & Leach.
But he noted that Twitter does have more political risk than other social media companies such as Facebook Inc, where messages tend to be shared among private groups rather