Under a new "fake news" law in Singapore, Facebook has reportedly added a notice to a user's post there, saying it contains info the government maintains is bogus. 

"Facebook is legally required to tell you that the Singapore government says this post has false information," says the notice, which was added to the bottom of the otherwise unaltered post, according to a Saturday report by Reuters. The news agency said the flagged post, from Nov. 23, contained accusations of election rigging.

a close up of a sign: Angela Lang/CNET © Provided by CBS Interactive Inc. Angela Lang/CNET

Facebook didn't immediately respond to CNET's request for comment, but in a statement to Reuters, a spokesman for the company said Facebook had added the notice "as required by Singapore law."

"As it is early days of the law coming into effect," the spokesman said in a statement to the news agency, "we hope the Singapore government's assurances that it will not impact free expression will lead to a measured and transparent approach to implementation."

The news comes as social media sites and government regulators struggle with how to balance worries about disinformation with concerns about censorship and free speech.

Reuters said rights groups have attacked Singapore's fake news law, which went into effect last month, saying it could threaten internet freedom there and elsewhere in Southeast Asia.

The notice added by Facebook to the Singapore post includes a "learn more" link, The Wall Street Journal reported Saturday. The link goes to "a new page briefly explaining the law and adding that as a 'neutral platform,' Facebook doesn't endorse the truthfulness of either the posts on its site or government corrections," the Journal said.

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SAN FRANCISCO, CA - SEPTEMBER 11:  Facebook Founder and CEO Mark Zuckerberg speaks during the TechCrunch Conference at SF Design Center on September 11, 2012 in San Francisco, California.  (Photo by C Flanigan/WireImage)